If you the medicine, you better now.
| A．took, would feel | B．had taken, felt | C．had taken, would feel | D．took, would have felt |
One thing’s for sure, the fire _____by some cigarette butts.
| A．might cause | B．could have caused |
| C．must have been caused | D．should be caused |
You could ________ this a really nice room if you bought a new carpet.
| A．make | B．turn | C．grow | D．get |
--- You’ve sold your car! You don’t need one?
--- _____. The traffic is too heavy nowadays.
| A．No problem. | B．Never mind. | C．Don’t mention it. | D．Not really |
. --- I think the waiter has forgotten us. We ________ here for over half an hour!
--- I think you’re right. He probably thinks we have already ordered.
| A．are waiting | B．have been waiting |
| C．have waited | D．will wait |
. When she woke up, she realized that things she had dreamed about could not _______ have happened.
| A．possibly | B．exactly | C．certainly | D．usually |