--- What do you think we can do for our parents? ---You _____ do anything except to be with them and be yourself. A. don't have to B. oughtn't to c. mustn't D. can't
The bus kept the people ______for twenty minutes.
I believe the scientists will______a better way to heal the disease.
----Why do you often ______this pink blouse? ----Because it fits me well.
Jack always runs faster than Peter, but this time he ______him.
The Internet ______it easy to get much new information in a short time.