I. Choose the best answer

1. His mother is short ………….. his sister is so tall.

A. although                  B. but                       C. and                      D. despite

2. Environmental ………….. is a serious problem facing mankind today.

A. polluted                   B. pollute                  C. pollution               D. polluting

3. In order to save money, we should use public transport ………….. motorbikes.

A. instead of                 B. except                  C. besides               D. along with

4. I’m really ………….. that people have spoiled the environment by littering garbage everywhere.

A. disappointing           B. disappointed         C. disappoint           D. disappointment

5. Lan suggested ………….. to the cinema tonight.

A. go                             B. to go                     C. went                    D. going

6. I’m ………….. that you are working hard.

A. pleasant                    B. pleased                 C. pleasure            D. pleasing

7. If the rice paddies ………….. polluted, the rice plants will die.

A. is                               B. was                        C. are                    D. were

8. Lan visited London last summer. She stayed in a hotel and her friend, Mary came to pick her ………….. to go sightseeing.

A. up                              B. over                        C. out                    D. of

9. The boy ………….. put up the Christmas decoration is my brother.

A. who                            B. whose                    C. whom               D. which

10. She has never learned ………….. to play the violin.

A. how                            B. what                       C. why                  D. whether

11. Owning a car is too costly, ………….. I traveled by bus instead.

A. so that                        B. so                           C. that                  D. since

12. The details should ………….. carefully.

A. is checked                  B. check                     C. was checked    D. be checked

13. If Mary doesn’t improve in math, we ………….. have to find a tutor for her.

A. will                              B. can                          C. should             D. would

14. The journey to the village is very ………….. .

A. interested                   B. interesting               C. disinterested    D. interest

15. I don’t like using the internet because it has some …………..

A. benefits                      B. advantages              C. limitations        D. disadvantages

Chuyển sang bị động

1. Mary is cutting the cake with a sharp knife.

2. All of my students are doing a lot of homework now.

3. I lost my bicycle yesterday.

Tính số khối của các nguyên tử sau:

a) Kali biết nó có 19 e, 19p, 20n

b) X biết nó có 15 e, 16n

Nguyên tử của nguyên tố X có 3 lớp e, lớp ngoài cùng có 5 e. Tính số hiệu nguyên tử của X.