2. The poison chemical waste is dumped into the rivers.

    A                              B             C                      D

3. As soon as he will come back from his office, tell him to see me.

A                           B                 C             D

4. He decided not say goodbye to his girlfriend at the airport.

        A                    B            C                        D

5. If the tour lasts for three days, we took more money to spend on enjoying everything.

        A                             B                                C                   D

40. Thanks to the weather forecast, the villagers……………before the food……………

                  A. had left / had come  B. left /came        C. left / come      D. had left / came

. I have told you ………………… football in the street many times.

A. will not play         B. do not play           C. not playing           D. not to play

Use a pencil to make a main stress mark on each word then choose the word that has main stress placed differently from the others:

1.     A. prefer                   B. enjoy                     C. mother                   D. affect

2.     A. affect                   B. happen                  C. pollution               D. polite

3.     A. pollution             B. picture                   C. village                   D. factory

4.     A. affect                   B. father                     C. teacher                  D. picture

5.     A. illustrate              B. believe                  C. affect                     D. behave

6.     A. artistic                 B. historic                  C. dramatic                D. scientific

7.     A. medical                B. national                 C. chemical               D. historical

8.     A. athletic                B. dramatic                C. scientific               D. heroic

9.     A. chemical             B. physical                C. environmental     D. medical

10.   A. medical               B. hospital                 C. politic                    D. electric

viết chương trình tính tổng các số chẵn trong phạm vi từ 2 đến 50 thông báo kết quả ra màn hình bằng cách sử dụng vòng lặp while...do.

1 vật được mốc vào lực kế, trong không khí lực kế chỉ 6,0n khi vật chìm trong nước lực kế chỉ 4,8n tính lực đẩy ac-sim-met