根据句意和所给汉语提示，写出句中所缺单词或短语的正确形式。

1. I used my__________（计算器）,or it will have taken a long time.

2. The__________（微波炉）makes cooking meals easier and quicker.

3. The__________（电灯泡）is the most useful invention.

4. I bought my mother a pair of__________（拖鞋）for her birthday.

5. Don't throw about__________（电池）. They are bad for the environment.

中 * * 党领导和执政地位的确立，是由（）。

A.党在国家中的领导地位决定的

B.党的路线方针政策决定的

C.党的性质和宗旨决定的

D.党员数量众多决定的