一Is your brother interested in art一Yes, he often ________ a lot of time ________．

23. Everyone should remember it is very important to _____ the balance of nature toady.

36. The entrance is _____ with such heavy stones as two or three big men can’t move.

_____ does Uncle Li go fishing a month — Many times.

The new survey shows that the number of students________computer games has been on the increase in recent years.