1 . He works day and night; that's ________makes him so tired and sleepy. (用适当的词填空)

2 . My decision is________all of us are to start at 6 o'clock tomorrow morning. (用适当的词填空)

3 . This is ________ my father has taught me—to always face difficulties and hope for the best. (用适当的词填空)

4 . He overslept and got up too late this morning and that was ________ he missed the train.（用适当的词填空）

6 . But my teacher always says, “We want to be   younger.” so about the age of Western women, my advice is ______ if you don’t know it, don’t ask about it; if you really know it, don’t mention it. (用适当的词填空)

8 . The ideal nap depends on______ you want from that nap．(用适当的词填空)

9 . ______ strikes me most in the movie is ______ the boy risks his life to jump into the river to save a little girl. (用适当的词填空)

10 . There is no doubt that patience and hard work is ________it takes to do a job well. (用适当的词填空)