----I don’t suppose the police know who did it.
----Well, surprisingly they do. A man has been arrested and _____ now.
| A．has being questioned | B．is questioning |
| C．has questioned | D．is being questioned |
October 24, 1860, the Qing government and the Britain sighed "the treaty ofBeijing", ___ put an end to the second Opium war．
| A．which | B．that | C．when | D．in which |
___ the invention of the steam engine, the industrial revolution played a vital role in human history．
| A．Originating in | B．Originated in |
| C．To originate in | D．Being originated in |
Blog, a shared on line journal where people can post diary entries about their personal experience and
hobbies, ___ more and more popular with people of all ages．
| A．becomes | B．become |
| C．becoming | D．is becoming |
My car’s performance is ___ since the engine’s been tuned and the tires have been changed．
| A．better as twice | B．twice as the condition |
| C．twice as good | D．twice as better |
He ___ away before we arrived, since the house was deserted．
| A．shall have gone | B．should have gone |
| C．could have gone | D．must have gone |