chemistry

在化学课上，我们做了一个观察化学反应的实验。

In ___chemistry class, we conducted an experiment to observe chemical reactions.

他们第一次见面就产生了奇妙的化学反应。

There was instant ___chemistry between them when they first met.

我喜欢化学，因为它很有趣。

I like ___chemistry because it is interesting.

我们每周有两节化学课。

We have two ___chemistry lessons every week.