It’ll be another 50 years _________ China is expected to reach the level of a medium developed country.
| A．since | B．before | C．that | D．when |
Excited by the news, Marie lay in bed with her eyes open while all her family were
asleep.
| A．widely; soundly | B．wide; sound | C．widely; sound | D．wide; soundly |
—Have you found out anything, sir?
—We are sure that the thief entered the house through the window instead of breaking in. Youhave closed the window before you left.
| A．shouldn’t | B．must | C．couldn’t | D．might |
As far as we know, traveling in space has been made with the development of science and technology.
| A．it was possible | B．it possible | C．possible | D．that possible |
After reporting the accident to the police, the couple hurried off and in the crowd.
| A．was lost | B．were lost | C．had lost | D．lost |
So far there is no proof people from other planets do exist.
| A．how | B．what | C．which | D．that |