Đốt cháy hỗn hợp bột Mg và bột Al cần 8,96 lít O2 ở đktc. Biết khối lượng Al là 2,7 gam. Tính thành phần phần trăm của hai kim loại trong hỗn hợp trên.

Câu III: Chọn đáp án thích hợp nhất để hoàn thành câu sau.

1. The opposite of “reduce” is ……………………………..

A. decrease                 B. increase                   C. destroy                   D. damage

2. Nobody is absent today, ………………………………..?

A. is he                        B. is she                       C. are they                   D. aren’t they

3. The team ……. by an experienced rice cook won the rice – cooking contest.

A. led                                      B. leads                                   C. leading                    D. lead

4. The prefix re – in the word reuse means ………………

A. against                    B. for                           C. no                           D. again

5. Farmers collect household and garden waste to make …………

A. compost                  B. floor coverings       C. glassware                D. pipes

6. I thought you said she was going away the next Sunday, ……………………….?

A. wasn’t she              B. didn’t you              C. didn’t I                   D. wasn’t it

7. Ha Long Bay is famous for its beautiful ……island.

A. stone                       B. limestone                C. rock                        D. cliff

8. I have been looking for this book for months, and ……I have found it.

A. in the end               B. in time                    C. at the end               D. at present

9. Many students found it very difficult to keep …..all the recent developments in the subject.

A. touch with              B. in touch with           C. touch of                 D. in touch of

10.       Linda: “What a lovely house you have!”        Janet: “……………………………………”.

A. No problem!           B. Thank you. Hope you’ll drop in     C. I think so          D. Of course not. It’s not costly

VI. Rewrite these sentences.

1. This is the first time I have seen him. => I have .............................................................................................

2. It’s thought that the weather will be worse. => The weather .........................................................................

3. I last saw him when I was a student. => I haven't .........................................................................................

4. He watches TV much, so his eyes are becoming worse. => The ………………………………………………

5. It's ten years since I last met him. => I haven't ...................................................................................................

6. My father will be cleaning the doors this time tomorrow.  => The doors ............................................................

7. I am going to buy a new car next week. => A new car …………………………………………………………

8. He likes making models. => He is ………………………………………………………………………………

9. I started studying English 3 years ago. => I have .................................................................................................

10. The last time she went out with him was two years ago. => She hasn't .............................................................

V. Make questions for the underlined parts:

1.       She went to the doctor because she had a backache.  => ………………………………………..............

2.       He had an appointment at half past ten. => ……………………………………………………………..

3.       They have traveled by plane for a long time. => ………………………………………………………..

4.        We met her at the city’s theater last night. => …………………………………………………………..

5.       Nga brushes her teeth three times a day.                => …………………………………………………………….

6.       My father worked in Ha Noi for two years. => …………………………………………………………..

7.       Nam is playing badminton with Minh. => ……………………………………………………………….

8.       They love reading books in their free time. => …………………………………………………………..

9.       I will tell Minh about the news. => ……………………………………………………………….……..

10.   Mai speaks English fluently. => …………….…………………………………….……………………...

IV. Change these sentences into reported speech.

1. She said “Would you like to drink some tea, Nam?”

=> She …………….……………………………………………………………………..

2. I’ll phone and inform you about it tomorrow” he said to her.

=> He promised …………………………………………………………………………..

3. “Have you been to an English speaking country?” he asked us.

=> He wondered …………………………………………………………………………

4. “Why didn’t you put the wrapper in the dustbin?” she said to the boy.

=> She asked ……………………………………………………………………………

5. “Is your son interested in sciences?” said the teacher to Mrs. Tram.

=> The teacher wanted to know ………………………………………………………..