选词填空。

in   to   with   at

1. I go to school at eight o'clock ________ the morning.

2. I have dinner ________ my family.

3. Let's go ________ school.

4. — What time do you have lunch?

    一 ________ twelve o'clock.

小明要将一个“一开三孔”开关（即一个开关和一个三孔插座连在一起）安装在新房里．图甲为实物图，图乙为反面接线示意图，“A”“B”是从开关接线柱接出的两根导线，请你帮他将图乙中的电路连接完整，使开关控制电灯，插座又方便其它电器使用．