用括号内所给单词的适当形式填空，共5分

小题1:What a            (please) it is for me to play the piano with you!

小题2:Mother asked the Greens to help          (they) to some pears.

小题3:Tim sings even          (badly) than before.

小题4:He felt          (true) sorry for what he said.

小题5:           (clean) work is to make our city clean.

下列不属于外照射防护方法的是（）。

A.时间防护

B.距离防护

C.屏蔽防护

D.个人防护

E.前三项