18B (live on: sinh sống)

19C (set off: bắt đầu đi)

20A (sau be+adj)

1. The boys are playing games , .................. the girls are watching TV.

A . so                                  B. nor                                               C . and

2. I tried my best in the final test , ............... the result was not as good as I expected.

A . but                                B . so                                                C . for

3. He lost the key , ................... he couldn't get into the house.

A . yet                                  B . or                                                C . so

4. She loves comedies , ................. her husband is interested in action films.

A . for                                   B . yet                                               C . or

5. You must do well in the test , .................. you will not graduate.

A . so                                    B . or                                                 C . for

6. Pop music is so popular,........ the melody is simple and memorable.

A . for                                    B . so                                                C . and

7. I should practice more for the competition,..... my health hasn't been excellent recently.

A . and                                   B . so                                                C . but

8. You can go to the movies with me,.... you can go to the concert alone.

A . and                                   B . or                                                 C . so