阅读短文，根据短文内容，在短文后的空格处填上一个恰当的词，使短文完整、通顺。
When the Americans were getting ready to send their first men to the moon, an old Australian was watching TV in a restaurant. There was  【小题1】 Englishman in the restaurant, too, and he  【小题2】  to the Australian, “The Americans are clever,  【小题3】  they? They are going to send some men to the moon. It is a very long way from our world .”
“Oh, that’s nothing,” the Australian answered quickly. “Our country is going to send some people to the sun in a few months. That’s  【小题4】  farther away than the moon, you know.”
“Oh, yes, it is,” the Englishman said, “but the sun is too hot for people to go to.”
The Australian laughed and said, “We won’t go to the sun in the day, of course.
We’ll go there 【小题5】  night.”

We won’t go back home ____ we find the owner of the handbag.

A. because  B. after  C. when  D. until

We won’t go to the Great Wall until the rain _______.