根据句意及所给首字母提示，完成下列句子。  

1. He doesn't like g          , but he likes math.

2. They like English very much. Look! They are p           speaking English over there.

3. We want to go to Beijing by plane, but he makes the s           that we go by train.

4. How do you usually s           the weekend?

5. Did you study for the English t          ?

煤的元素组成是指煤中有机组分中的主要元素。它们是碳、氢、氧、氮、硫等五种元素。其中，煤中的（）是组成煤的有机高分子的最主要元素。

A、碳

B、氢

C、氧

D、硫