Among the many dangers_________-- sailors have to face, probably the greatest of all is fog.
| A．which | B．what |
| C．where | D．when |
more energy to my study instead of being crazy about Internet games, I would be sitting in a comfortable office now．
| A．If I devoted | B．Had I devoted |
| C．Would I be devoted | D．Should I be devoted |
Jack is a great talker. It's high time that he ________ something instead of just talking.
| A．will do | B．has done |
| C．do | D．did |
It is necessary that the government solutions for the problems of air pollution to create a clear environment.
| A．should have found | B．could have found |
| C．could find | D．should find |
We lost our way in that small village, otherwise we________ more places of interest yesterday.
| A．visited | B．had visited |
| C．would visit | D．would have visited |
If we _______ adequate preparations, the conference wouldn’t have been so successful.
| A．haven’t made | B．wouldn’t make |
| C．didn’t make | D．hadn’t made |