AI CHỈ MÌNH VỚI MÌNH CẢM ƠN
AI GIÚP MÌNH VỚI MÌNH CẢM ƠN NHIỀU
21. Hoa looks red. She was outdoors yesterday. Perhaps she has _______
A. flu B. sunburn C. spots D. stomachache
22. My family has decided to use _________ electricity by using more solar energy instead.
A. more B. less C. much D. fewer
23. I ............... playing board games interesting because I can play them with my friends.
A. find B. think C. say D. tell
24. Circle the word that has the underlined part pronounced differently from the others.
A. curl B. keen C. city D. cook
25. I …………….. Nha Trang when I was a child.
A. visit B. visited C. will visit D. have visited
26. He …………… to the USA so far.
A. is B. was C. will be D. has been
27. Americans eat a lot of junk food, ………….junk food causes obesity.
A. but B. and C. so D. because
28. Tim: I feel itchy and my nose is running. Doctor: ………………………..
A. Wash your hair more. B. I think you have the flu.
C. Drink more water. Eat less meat D. I think you have a stomachache.
29. Pick out the word whose main stress is placed differently from the others.
A. allergy B. headache C. temperature D. obesity
30. Choose the word that has the underlined part pronounced differently from the others.
A. cold B. curly C. ocean D. clothes
31. -“What would you like to drink now?” - “_______________.”
A. No, thanks B. Yes, please C. I like to do nothing D. Orange juice, please
32. All of us enjoy _______ to classical music.
A. listen B. listens C. listening D. listened
33. She worked very hard, _______she passed all her exams.
A. because B. and C. so D. but
35. -“ Would you like me to turn off your computer?
- “ ______________. I’ll do it myself”
A. No, thanks B. Yes, please C. Don’t do it D. Of course
PART B. WRITING
I. Put the verbs in the correct form.
1. I enjoy (fish) .................................................. because it (be) ……………….… relaxing.
2. Jane will play chess after she (finish) …………………………. school.
3. What …………………… your mother often (do) ………………………at weekends?
4. I think, in the future people (not play) ………………………………… individual games.
5. We find (arrange) ……………………… flowers interesting because it (help) ……………… us relax.
6. I (not collect) ………….……………………… dolls when I grow up.
7. She often (go) ......................... to the market with her mother every weekend.
8. We (visit) ...................... Hue next month.
9. My younger sister (collect) ................. dolls two years ago.
10. .................. you ever (do) ................. volunteer work ?
II. Arrange these words/ phrases into the meaning sentences
1. sunburn / yesterday / was / because / outside / has / Alice / she / all / day .
……………………………………………………………………………………………..
2. and / difficult / boring / that / eggshells / people / carving / Some / say / is
..…………………………………………………………………………………………..
3. girl / have / is / the / kind-hearted / She / most / ever / I /met
……………………………………………………………………………………………..
4. organization / the / to / encouraged / people / Big Heart / has / protect / environment.
……………………………………………………………………………………………..
III. Write full sentences using the suggested words and phrases given.
1.Tuan / find / play / table tennis / interesting / because / he / can / play / best friends.
…………………………………………………………………………………………
2.They / visited / Ho Chi Minh City / so far.
…………………………………………………………………………………………
3.Lan / like / talk / to / her friends / her free time.
…………………………………………………………………………………………
4. We/ not eat/ out/ since/ mom’s birthday.
…………………………………………..
5. How/ long/ you/ live/ here?
…………………………………………..
6. You/ ever/ been/ Russia?
…………………………………………..
7. She/ not/ meet/ kids/ since Christmas.
…………………………………………..
8. They/ repair/ lamps/ yet?
…………………………………………..
IV. Complete each sentence so it means the same as the sentence above.
1. I didn’t go to school because I was sick.
à I was sick, so …………………………………………………………………
2.It will be good if you eat less meat and more vegetables.
à You should ………………………………………………………………………
3. He likes playing computer games in his free time.
à His hobby is ……………………………………………………………………..
4. I am interested in watching TV in the evening.
à I enjoy ………………………………………………………………………
5.I think that learning English is important.
à I find ……………………………………………………………………………..
6. He started working as a bank clerk 3 months ago.
=> He has.................................................................................................................
7. I last had my hair cut in November.
=> I haven't................................................................................................................
8. The last time we called each other was 5 months ago.
=> We haven't.............................................................................................................
PTHH: \(CuO+H_2SO_4\rightarrow CuSO_4+H_2O\)
\(Cu+2H_2SO_{4\left(đ\right)}\xrightarrow[]{t^o}CuSO_4+SO_2\uparrow+2H_2O\)
Khí A là SO2
Ta có: \(n_{SO_2}=\dfrac{1,12}{22,4}=0,05\left(mol\right)=n_{Cu}\)
\(\Rightarrow\%m_{Cu}=\dfrac{0,05\cdot64}{10}\cdot100\%=32\%\) \(\Rightarrow\%m_{CuO}=68\%\)
Mình cảm ơn ạ