It is required that no smoking ______ in the school.
| A．was allowed | B．be allowed |
| C．would be allowed | D．had been allowed |
However, it only appears in the imagination and will never be ______.
| A．realized | B．supported |
| C．understood | D．produced |
Travelling west, you set your clock ______; travelling east, you set it ahead.
| A．behind | B．forward | C．back | D．ahead |
--Look! How long _____ like this?
--Three weeks! It s usual here that rain _____ without stopping these days of the year.
| A．had it rained; pours | B．has it been raining; pours |
| C．is it rained; is pouring | D．does it rain; pours |
Mo Yan said he would never forget those years ________ he lived in his hometown with his family, _______ has a great effect on his life.
| A．when; that | B．that; which |
| C．which; who | D．when; which |
A man does not know the difficulty of anything _______ he does it personally.
| A．although | B．if | C．because | D．unless |