Nêu 6 phương pháp hóa học khác nhau để phân biệt 2 dung dịch C₂H₅OH và CH₃COOH.

VII - Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions.

Pollution can be seen not only throughout the world, but also in our own homes. It comes from household chemicals, the amount of water people use and the waste people produce and throw away. What can be done to stop this pollution? Surprisingly, a person can help save the environment by doing simple things.

First, we need to recycle, which allows products to be used over and over again. Recycling can also reduce the number of trees cut down to produce paper products. It takes very little effort. It is not hard to place plastic and glass bottles, aluminum cans and paper in a bin. Anyone can do it.

Second, we need to watch the amount of water used at home. It can be conserved by taking short showers instead of baths, repairing leaky faucets, using the dishwasher or washing machine only when fully loaded, or simply turning the faucet off while brushing your teeth.

Third, we need to reduce waste. We need to recycle whenever possible, but shouldalso try to use this waste effectively. For example, grass clippings and food scraps can be made into compost for plants. The average person produces 4.3 pounds of waste every day, but we can reduce that amount by recycling and reusing.

If we do our part in our own homes, we can help keep the planet from becoming more polluted.

44, The average person produces every day _______.

A. three point four pounds of waste B. thirty four pounds of waste

C. four point three pounds of waste D. forty three pounds of waste

45, If we do our part in our own homes, we can help keep ______.

A. the planet from becoming less polluted B. the planet from becoming more polluted

C. the house from becoming few polluted D. the planet from becoming little polluted

46, My parents bought a new house last month.

==> A new house ......................................................

47, " Where are you doing now ? " my friend said,

==> My friend .............................................................

48, She can't buy that bike because she doesn't have enough money.

==> If she ......................................................................

49, I don't have a bicycle.

==> I wish ........................................................................

50, I never go to school late.

==> Never ...........................................................................

Sửa từ sai

21, Mathematics has been my difficult most subject so far this year.

A B C D

22, We'd better hurry, or the train might leaves without us.

A B C D

23, If we go on to litter, the environment will become seriously polluted.

A B C D

24, I was amazing that he was interested in our plan.

A B C D

24, Lan said she would go to her hometown next summer.

A B C D

I

1, A. although B. southern C. theater D. these

2, A. stopped B. missed C. looked D. needed

3, A. airports B. suitcases C. things D. calculators

4, A. service B. practice C. advice D. wide

5, A. locate B. situate C. pagoda D. landscape

II

6, Last night i (walk) _______ along thestreet when i suddenly heard foodsteps behind me.

7, My father (do) ______ morning exercise every morning.

8, (they/just/receive) ______ an email from their close friend ?

9, Look at that girl ! She (wear) ______ a beautiful red dress which i like.

10, Lan (buy) ______ a new bike next month.

III

11, The boy _____ by the window is very intelligent.

A. sitting B. is sitting C. sits D. are sitting

12, We have _____ ways of learning a foreign language.

A. different B. difference C. differently D. differenty

13, I went to school as usual yesterday _____ I had a bad cold.

A. but B. although C. so D. because

14, Nam said that he _____ to school then.

A. is going B. was going C. went D. goes

15, This kind of chocolate tastes delicious, _____ ?

A. does it B. doesn't it C. isn't it D. is it

16, Nam was born in Vietnam. Vietnamese is his _____ language.

A. first B. second C. mother D. third

17, My grandmother used _____ after my uncle and my aunt.

A. look B. to look C. looking D. looked

18, He is tired _____ he stayed up too late to watch TV lastnight.

A. so B. because C. but D. and

19, Where _____ you go if you have a car ?

A. would B. have C. did D. will

20, He is the man _____ helped me yesterday.

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

46," I am going to the meeting now, " said the teacher.

----> The teacher said _________________________.