1．Always read the instructions (instruct) on the bottle carefully and take the right amount of medicine.
2．In conclusion (conclude), I would like to say how much I have enjoyed myself today.
3．Mark is a cautious (caution) shopper who always does some careful research on the market before he buys something valuable.
4．When he came back three hours later，they were still sitting on the sofa， absorbed (absorb) in conversation.
5．It is so challenging (challenge) a job that I can't finish it on my own.
6．Children，when exposed (expose) to an Englishspeaking atmosphere, will pick up the language much more easily.
7．He made an apology to me for his not attending (attend) the concert on time.
8．It may not be a great suggestion.But before a better one is put forward ， we'll make do with it.
9．Whenever he didn't perform well in his studies, he would blame his failure on carelessness.
10．Although her relatives didn't think she could live for three months，the old doctor finally cured her of her disease.
