请根据图画所给的示例及下图A、B、C、D、E的提示完成句子。

1. If you make the wheels  A            , they will turn more easily.

2. The plants will die if you don't give them B            .

3. If I work hard, I'll C             good exam results.

4. If I go to Beijing, I'll visit D            . 

5. If Sam buys E            newspapers a week, he spends ￥10.

混凝土强度达到（）兆帕前，不得在其上踩踏、堆放物料、安装模板及支架。

A.1.5

B.1.2

C.1.6

D.2.0