21.They went on working ________it was late at night.

　　A. even if B. as if

　　C. however D. as though

　　22.I hurried ________I wouldn’t be late for class.

　　A. since B. so that

　　C. as if D. unless

　　23.The volleyball match will be put off if it ________.

　　A. will rain B. rains

　　C. rained D. is raining

　　24.________ you talk to someone or write a message，you show your skills to others.

　　A. At times B. Some time

　　C. By the time D. Every time

　　25.Although he is considered a great writer，________.

　　A. however his works are not widely read

　　B. but his works are not widely read

　　C. his works are not widely read

　　D. still his works are not widely read

　　26.The new secretary is supposed to report to the manager as soon as she ________.

　　A. will arrive

　　B. is going to arrive

　　C. arrives

　　D. is arriving

　　27.We should finish the important job，________.

　　A. long it takes however

　　B. it takes however long

　　C. long however it takes

　　D. however long it takes

　　28.________he made an important speech at the meeting was true.

　　A. That B. Why

　　C. What D. How

　　29.________comes to the party will receive a gift.

　　A. Which B. Who

　　C. Which one D. Whoever

　　30.She is willing to help you, ________busy she is.

　　A. what B. how

　　C. however D. whatever

　　31.I don’t care whether he stays ________goes.

　　A. nor B. then

　　C. or D. otherwise

　　32.No matter ________hard it may be，I’ll carry it out.

　　A. what B. whatever

　　C. how D. however

　　33.Why do you want to find a new job ________you’ve got such a good one already?

　　A. that B. where

　　C. which D. when

　　34.________he is, he will be thinking of you.

　　A. Wherever B. Where

　　C. Now that D. As soon as

　　35.You should make it a rule to leave things ________you can find them again.

　　A. when B. where

　　C. then D. there

　　36.He got excited at the news，________ I was calm.

　　A. when B. while

　　C. because D. after

　　37.—Shall Brown come and play computer games?

　　—No，________ he has finished his homework.

　　A. when B. if

　　C. unless D. once

　　38.________ you try，you will never succeed.

　　A. If B. Until

　　C. Since D. Unless

　　39.Hardly had he arrived in Hongkong ________she rang me up.

　　A. when B. than

　　C. that D. and

　　40.________ they heard the shout for help，they rushed out.

　　A. Immediately

　　B. The moment

　　C. The while

　　D. All the above