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4 （8）It seems that he is much afraid.

（9）I can’t stand it any longer．

（10）It was several months before we met again. 16．It seems that everyone has known the news. 17．It’s worthwhile working the whole night on the problem.

18．It doesn’t matter what you do.

19．The teacher makes it clear that everyone should hand in his homework on time .

20．We take it for granted that we must warm ourselves in winter times, yet we seldom realize the burning away of precious natural resources.