20.The sportsman suddenly ________ down while he was running the 1,500-meter race.( )
| A. | would fall | B. | fell | C. | was falling | D. | had fallen |
19.His parents encouraged little Jerry ________ to play the violin at a young age.( )
| A. | to learn | B. | learn | C. | learned | D. | learning |
18.Jack is considering ________ his flat into a big house at the moment.( )
| A. | to change | B. | changed | C. | change | D. | changing |
17.Jack eats a lot and never takes exercise.He is ________ of us three.( )
| A. | fat | B. | fatter | C. | fattest | D. | the fattest |
16.The earth was so seriously polluted ________ we must take action to save the planet.( )
| A. | as | B. | that | C. | so | D. | before |
15.Tom's mother walked as ________ as possible so that her son could keep up.( )
| A. | safely | B. | carefully | C. | slowly | D. | quickly |
14.It's amazing that my opinion on the problem is similar ________ my teacher's.( )
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| A. | for | B. | with | C. | of | D. | to |