21、I could have been on time for the meeting, but I _____ in a traffic jam for over half an hour.

A．have caught       B．have been caught      C．was caught      D．caught

20、―English, as a living language, _____ all the time.

―Right. Who knows what it will be like in the years to come?

A．will change        B．was changing         C．is changing       D．has changed

19、“By no means,” declared the captain, “_____ give way to disappointment.”

A．we would       B．we will          C．might we        D．shall we

18、

In hot weather, an old tire can break again easily _____ it’s mended.

A．when           B．where           C．which             D．that

17、Dress yourself up, _____ you are unlikely to be allowed in.

A．a(chǎn)nd             B．but            C．or               D．so

16、It’s amazing that Mike should get such good marks while he does only _____ the others.

A．a(chǎn)s much as half         B．half as much as      C．a(chǎn)s many as half      D．half as many as

15、―We have been in the traffic for an hour by now.

―Yeah．I’m afraid we’ll never _____ it to the conference.

A．get             B．have               C．do            D．make

14、―I think Tom is tolerant, generous and humorous and his girl friend is talkative, energetic and easy-going.

―_____ What a pair!

A．Congratulations!                    B．Oh, I’m glad to hear that.

C．I couldn’t agree more.         D．It’s a pleasure.

13、The editor-in-chief asked me to write another article for them, _____ about how to prevent bird flu.

A．that         B．one            C．it                 D．which

12、Determined to stand up and make a living by herself, Frida began to learn to paint _____ she was limited to bed and wheelchair.

A．because        B．even though                C．unless              D．in case