1. A. buyed --> bought
2. B. take --> took
3. D. wanted --> want
4. C. did --> do
5. B. hardly --> hard

VIII. There is a mistake in the four underlined parts of each sentence. Find the mistakes (A, B, C, or D)
1. Nam studies very hardly, so he always gets good marks
                 A                   B                   C                       D
2. She spoke so quick that I didn’t understand what she meant
               A           B                  C                                      D
3. Between 1980 to 1990, the area was hit by five disastrous tornadoes.
              A             B              C                        D
4. It’s raining because we can’t go to the beach
     A                     B               C         D 
5. Did your children enjoy to swim in the sea?
     A                             B         C            D
6. 15. She enjoyed listening to music and  go  shopping.
                                     A                   B     C        D
7. If we pollute the water, we don’t have fresh water to use
                   A                                 B              C                 D
8. My cousin has been  in the army for he was 18.
                            A        B                  C         D
9. I didn't receive Lan's email since she  moved  to Nha Trang last month.
                 A                                          B       C      D
10. It has been  a long time since I have visited Kuala Lumpur.
              A         B                  C              D 
11. Nam uses to go fishing when he was young.
                 A                  B        C      D
12. It  rained heavily while I slept soundly last night.
      A                   B                   C                D
13. John can't play football now. He wishes he can play it.
                A                                            B           C             D
14. What often do you write to  your pen pal? - Twice a month
        A                                       B      C                           D
15. Your brother likes watching documentaries, isn't he?
                               A         B                     C                D
16. You didn't read the article about environment, have you?
                 A              B          C                                       D
17. Tom said that he is learning English in an evening class.
                        A         B                       C                  D