To make the students understand the problem the teacher tried to explain it, but the explanation just did not _________to the class．

______. It’s time for class. [ ]

______ is a waste of time spending many hours ______ computer games every day.

Peter, where did you guys go for the summer vacation —We _______ busy with our work for months, so we went to the beach.

The officer made his men _____ his order at once.