单词拼写。

 根据下列句子及所给汉语注释,写出空缺处各单词的正确形式。(每空只写一词)

1.When his mother entered the room, he ______ to be reading.(假装)

2.On teachers' Day, large quantities of ________kept pouring in. (明信片)

3.The dark clouds are gathering. It is _________hard.(刮)

4.You'd better not have these _______running all the time. (拖拉机)

5. I've only two ______ left in my hand. (钻石)

6.The teacher prepared various reading ______(材料) for practising reading.

7. May 4th ______ took place in 1919.(运动)

8. My little brother is much ______ than me. (淘气)

9. An idea suddenly ______me that he might have an accident.(想起)

10. Introductions are ______ since you all know each other. (没必要)