题目内容：

 

1.老师要求我们按时上交作业。

Teachers require us to ___________________ our homework on time.

2.约翰太粗心了，不能照看好他的宠物。

John is _________________ look after his pets well.

3.结果证明，谋杀案和那个工程师无关。

It turned out that the engineer _____________________the murder.

4.一天工作之后，他精疲力尽。

After a day’s work, he was _______________.

5.月球上的食物很可能会以药片的形式存在，而且味道没那么可口。

Food on the moon would most probably be _________________ pills and would not be tasty.