— Has your father returned from Africa yet?
— Yes, but he here for only three days before his company sent him to Australia．
| A．was | B．has been | C．will be | D．would be |
John is very ____ ——if he promises to do something he’ll do it .
| A．independent | B．confident | C．reliable | D．flexible |
This printer is of good quality. If it _______ break down within the first year, we would repair it at our expense.
| A．would | B．should | C．could | D．might |
I have reached a point in my lifeI am supposed to make decisions of my own.
| A．which | B．where | C．how | D．why |
I travel to the Binhai New Area by light railway every day, _____ do many businessmen who live in downtown Tianjin.
| A．as | B．which | C．when | D．though |
Over the past decades, sea ice _______ in the Arctic as a result of global warming.
| A．had decreased | B．decreased | C．has been decreasing | D．is decreasing |