A survey of the opinions of experts that three hours of outdoor exercise a week is good for one’s health.A. show B. shows C. is shown
Why not ______ help when you were in danger?
Would you mind ______ louder? I can’t hear you clearly.
The movie is ______, and Joan is ______ in it.
---______ shells do you have? ---Over 100 so far.
---______ did you first skate? ---Two years ago.