David, ________yourself. Did you forget the school rules?
You might those fireworks, Jane. Do be careful with them.
Leave it to me! I feel more about myself and my abilities these days.
The difficulty which we had _______ with the local people has now been removed·
The surface of the table ______ smooth enough.
At last,we found ourselves in a pleasant park ________trees providing shade(荫凉)and sat down to eat our picnic lunch.