Not only do the two brothers look _____ but also they walk, talk and think _____. Sometimes, it is hard to tell them apart. [ ]

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

I ________this book for about a month, so I have to return it as soon as possible.

Though ____ the dangers of smoking to their health, smokers still find it hard to give up smoking.

The noise of the traffic makes my head________.How I wish I were not on the road.[ ]