.
By the time he realizes he ________ into a trap, it’ll be too late for him to do anything about it.
| A．walks | B．walked | C．had walked | D．has walked |
Hellen set a good example ________ other mothers in demanding that children ________ enough time for sleep and play.
| A．with; should give | B．at; give | C．to; would be given | D．to; be given |
Soon after the PRC was set up, a new law was passed which _______ people’s freedom of speech, religion and demonstration.
| A．announced | B．guaranteed | C．kept | D．prevented |
— Does Martin regret wasting so much time playing online games?
— ________. I suppose he can never give it up.
| A．Never mind | B．All right | C．Not really | D．Not surprising |
We all agree that _______ good knowledge of physics is a must in explaining such _______ natural phenomena.
| A．a; / | B．a; a | C．/; a | D．/; / |
— How many jobs _______ Collin Manning, the exchange teacher to our school, has done?
— Five, _______ cook to teacher.
| A．is it that; ranged from | B．are there what; ranging from |
| C．is it that; ranging from | D．are there what; ranged from |