--I haven’t heard from John for a long time. --What do you suppose to him?
_______ the days going on, the weather is becoming hotter and hotter.
We tried to ______ his doubts and let him tell the truth.
Advertisements are a good __________ sell products or services.
Violence (暴力) computer games may have a bad ____________ on children.
Mary is often heard ________ playing piano in the next room in the evening.