He was hiding behind the door _________ he could see what was happening.
A. which B. from where C from which D. where
Einstein liked Bose’s paper so much that he ________ his own work and translated it into German.
| A．gave off | B．turned down | C．took over | D．set aside |
He seems __________ what he is looking for.
| A．to have forgotten | B．to forget | C．forgetting | D．being forgotten |
I’m not surprised that he became a writer. Even as a child he had a(n) __________imagination.
| A．clear | B．elegant | C．funny | D．vivid |
Next winter, ____I’ll stay in Jilin City, will surely be another exciting holiday.
| A．which | B．when | C．that | D．where |
___in the regulations that one should not tell other people the password of your email account.
| A．What is recommended | B．What recommend |
| C．It is recommended | D．It recommend |