The rare species which are ____ disappearing should deserve more attention from us human beings.
| A．in place of | B．in search of | C．in memory of | D．in danger of |
The old lady had expected to see all her relatives when she was ill in hospital, but none came to see her ______ many of her neighbors offered their help．
| A．when | B．as | C．because | D．while |
It’s important for us to employ a word or a phrase according to the ______ in language studies．
| A．situation | B．expression | C．condition | D．translation |
—As we know, you won’t go back to the USA since you have established a research center here．But how long _____ in America?
—For almost 10 years．
| A．did you study | B．have you studied |
| C．were you studying | D．have you been studying |
—It appears that your relationship with Mike is not normal, doesn’t it?
—I thought of him as a trustworthy friend _____, to my shock, he gave me away to the boss．
| A．unless | B．since | C．for | D．until |
It was an exciting moment for these football fans this month, _____ again Sun Wen appeared on the football pitch．
| A．that | B．where | C．which | D．when |