We should make contributions ______ our environment.
A. to protecting B. to protect C. protecting
He was so tired that he fell asleep ___he went to bed.
| A．as if | B．even though | C．ever since | D．as soon as |
Last Thursday when I got to the airport, I ____I had left my ticket at home.
| A．forgot | B．realized | C．believed | D．seemed |
There are two new buildings near the sea, and ____of them are very tall.
| A．none | B．all | C．neither | D．both |
The boy ____won the first prize is called Roy.
| A．when | B．whom | C．who | D．which |
---_____?
---I don’t feel very well today. I’ve got a pain here.
| A．Can I take your temperature | B．What’s wrong with you |
| C．Do you have a cough | D．How long have you been like this |