Too high house prices can be brought under control, ________ the authorities introduce a series of regulatory policies.
| A．even if | B．as if |
| C．so that | D．provided that |
Without electricity human life __________ quite different today.
| A．is | B．will be | C．would have been | D．would be |
Gunpowder is generally believed __________ in ancient China.
| A．to have invented | B．being invented | C．to have been invented | D．having invented |
It was __________ great shock to the world that a French airplane got missing over __________ Atlantic Ocean on June 1st, 2009.
| A．a; ／ | B．the; the | C．a; the | D．/; the |
I feel nervous before the exam.
-- __________. It won’t be too difficult for you to pass.
| A．Take it easy | B．Never mind | C．Take your time | D．Don’t mention it |
－How was Nadal’s cooking?
－Oh, _______. I was quite impressed.
| A．that’s OK | B．all right | C．pretty good | D．just so-so |