Come and see me whenever _______.
| A．you are convenient | B．you will be convenient |
| C．it is convenient to you | D．it will be convenient to you |
．It will be about three years________next Olympic Games are held.
| A．when | B．since | C．that | D．before |
__________ the traffic jam, he arrived on time.
| A．Without | B．Expect | C．Despite | D．For |
Faced with financial uncertainty, the family decided to____ their trip to Europe to save money.
| A．call off | B．call for | C．call in | D．call on |
—How about going out for a picnic on Sunday morning?
—Hmm．___．The weather is very good these days．
| A．Yes, why not | B．Well, no way |
| C．Oh, never mind | D．Sure, no matter |
Years ago we didn’t know this , but recent science______that people who don’t sleep well soon get ill.
| A．showed | B．has shown | C．will show | D．is showing |