动词-ing形式可在句中作主语、表语、宾语、宾语补足语和状语。
1.— I’m not good at spoken English. What should I do?
— Why don’t you join an English club to practice ______ English?
A. speak
B. to speak
C. speaking
D. to speaking
2. Miss Brown thinks students should spend as much time as they can ______ in their spare time.
A. read
B. to read
C. reading
D. to reading
3. Jenny is looking forward to ______ her pen friend in Austria.
A. be heard from
B. be hearing from
C. hear from
D. hearing from
4. At 8:45 in the morning, I saw Eric ______ in the playground by himself.
A. running
B. to run
C. runs
D. to be running
5. The children often lie on the grass, ______ the stars in the sky.
A. watches
B. watching
C. watched
D. watch
KEY：CCDAB
