用所给词的适当形式填空。

1. Look! Whose _______ (Walkman) are these? Perhaps they are the twin's.

2. Is there an _______(electric) shop in your town?

3. Amy wants to buy some presents for _______ (they).

4. Do you understand the _______(mean) of the new world?

5. Do you like to have cold _______(drink)?

非氧化性杀生剂主要有（）。

A.有机硫化合物

B.氯的化合物

C.季铵盐类化合物

D.铜的化合物