将下面句子改为同义句.(

1. A. It's rude to point at anyone with your chopsticks.

    B. It's _____  _____ point at anyone with your chopsticks.

2. A. We should keep our classroom clean and tidy.

    B. Our classroom should _____ _____ clean and tidy.

3. A. It's raining hard, so we have to stay here for a while.

    B. It's raining _____ hard _____ we have to stay here for a while.

4. A. The little boy stopped crying and listened to music.

    B. The little boy didn't cry _____ _____ and listened to music.

5. A. There is only a desk in the room.

    B. There is_____ _____ a desk in the room

1公里，现需要在隧道两侧安装照明灯和广告牌，若起点、终点以及从起点到终点每隔50米都需要安装一盏照明灯，并且在相邻照明灯之间需要安装一幅广告牌，则共需安装照明灯 (1) 盏、广告牌 (2) 幅。

1（）

A．40

B．42

C．44

D．46