问题

The astronauts found that ______ the spaceship went further and further into space, it became more and more difficult to control its own movements

A:if
B:till
C:as
D:while

正确答案是：

同类题型

The mother takes pride in her son’s excellent achievements.

We’ve invited Mr and Mrs Brown to dinner. But we’ll have to________ because of the baby’s sickness. [ ]

Nanjing isn’t as large ___Shanghai, however, it’s the second____city in East China.

I telephoned him twice and I couldn’t get through to him.— I think that the line might have been out of order, ______? [ ]

下列各句中，标点符号使用正确的一句是