I ＿＿ ping-pong quite well, but I haven’t had time to play since the new year.
| A．will play | B．have played | C．played | D．play |
______ in the novel, I didn’t notice what was happening.
| A．Buried | B．having buried |
| C．Burying | D．To be buried |
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 |