When he knew that he had passed the driving test, he smiled _______.
| A．in danger | B．in relief | C．in peace | D．in return |
He was seriously injured in the traffic accident. _______ is now no possibility _____ he will make a full recovery.
| A．It; whether . | B．It; that | C．There; whether | D．There; that |
At night, plants _________carbon dioxide and at the same time _________oxygen. So, we may put some in our bedrooms to purify the air.
| A．take in, give out | B．take up, give off |
| C．take in, give in | D．take off, give up |
Only when I left home to go to college ___ how much my mother had done for me.
| A．did I realize | B．I realized | C．had I realized | D．I had realized |
For many cities in the world, there is no room to spread out farther, _____New York is an example.
| A．for which | B．in which | C．of which | D．from which |
Beautifully ________ in a quiet spot near the river, the hotel attracts a lot of people to stay.
| A．locating | B．lies | C．situated | D．sat |