It’s going to rain. Xiao Feng, Will you please help me _____the clothes on the line?
AIDS control and prevention is a ___ to China as well as the whole world.
The fresh air on the farm ___ him ___ his headache.
Once ___ light, the film will be damaged and get useless.
The patient has been ___ by nurses night and day since the operation.
You can have your computer repaired by John, which is ___ he is ___.