根据句意用括号内所给单词的适当形式填空。

1.Wei Hua gave me two______ yesterday. (book)

2.That pen isn't yours. It's ______ . (her)

3.The ______ lesson is very easy. (six)

4.John is ______ than Sam. (tall)

5.Can you help ______ with my English? (I)

6.Lin Lin is the ______ in our class. (young)

发爆器必须（）妥善保管，上下井随身携带，班班升井检查。

A.班组长

B.瓦斯检查员

C.爆破工