16．He looked around and caught a man _______ his hand into thepassenger’s pocket．

________ busy schoolwork, the children also have to take arts, music and sports classes in their free time.-I wonder what they will become.[ ]

It is true that he is a model worker, _______he is not a good father for his son.

Don’t _____ jeans to the party.

In the face of _____ failure, it isvital that we should keep up _____ good state of mind．