1 . I’m afraid he’s more of a talker than a doer, which is ________ he never finishes anything. (用适当的词填空)

2 . A ship in harbor is safe, but that is not________ ships are built for. (用适当的词填空)

3 . Without his support, we wouldn't be ________ we are now.（用适当的词填空）

4 . 今天早上我开会迟到的原因是我起床晚了。
________ ________ ________ I was late for the meeting this morning ________ ________ I got up late.

5 . (有)一栋大房子是很好的,不过实际情况是我们买不起。
A large house would be wonderful, but ________ ________ ________ ________ we can’t afford one.

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

7 . The Great Wall, the Palace Museum and the friendly people are ________many foreigners like Beijing. (用适当的词填空)

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

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

10 . Another benefit of exercise is ______it will improve your body's immune system, making you better prepared to fight off infection. (用适当的词填空)