1 . He didn’t catch the bus. That’s ________ he was late for school. (用适当的词填空)

2 . The truth of the matter is ________ we had no other choice. （用适当的词填空）

3 . The only question left is__________ often the workers are paid.

4 . What puzzles Lily's friends is ________ she always has so many crazy ideas.

A．whether

B．why

C．what

D．when

5 . Two years later, Dad started his own business, which wasn't doing so well. That was ______things started to change. (用适当的词填空)

6 . Perhaps this is ________photos are for: to remind us that we all appreciate beauty, that we all share a common desire for pleasure, for connection, for something that is greater than us. (用适当的词填空)

7 . What puzzled me was __________book I should choose. (用适当的词填空)

8 . The problem is __________has got away with the document. (用适当的词填空)

9 . 让我震惊的是地震发生时,这个小女孩是如何保护她的同学们的。
What shocked me was___ ___ ___ ___ ___ ___ ___when the earthquake happened.

10 . After all, with the help of my electronic brain which never forgets anything, using intelligence is __________ I’m all about! (不管怎样，在我过目不忘的电子脑的帮助下，运用智能就是我的一切。) （根据汉语提示填空）