As a boy, he was_______ hard all day long.
| A．made to work | B．to make working | C．made working | D．to make work |
I am sorry that I can not meet you at the railway station. I _______ Beijing by the time you come back from abroad.
| A．have left | B．will have left |
| C．will leave | D． am leaving |
The thief looked around every now and then _____ he knew he was being followed.
| A．even if | B．in case | C．so that | D．as if |
He insisted ______ alone in the mountain.
| A．on to live | B．on living |
| C．living | D．in living |
Xi’an was attacked by such a terrible smog _____ few residents had ever experienced before.
| A．which | B．and it was | C．as | D．that |
____ an important decision more on emotion than on reason, you will regret it sooner or later.
| A．Basing | B．To base | C．Based | D．Base |