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(   ) 23. The clock is that       can tell us the time.

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

(   ) 22. Poor      he is, he is always very happy.

A. when    B. while     C. as    D. before

(   ) 21. Mary was drawing on the blackboard       the teacher came in.

A. when    B. while C. as    D. since

(   ) 20. The teacher showed us      do.

A. what can a computer    B. how could a computer

C. what a computer could    D. how can a computer

(   ) 19. We hoped the wind      before we      out.

A. will stop,started B. would stop,would start

C. would stop,started D. stop,will start

(   ) 18. We couldn't decide      the best.

A. which is composition    B. whose composition was

C. whose composition is    D. whose is composition

(   ) 17. I don't know      

A. what does a milu deer look    B. how a milu deer is like

C.how is a milu deer like      D. what a milu deer looks like

(   ) 16. ________ the day went on,the weather got worse.

A. With    B. Since C. While    D. As

(   ) 15. ________ ，Mother will wait for him to have dinner together.

A. However late is he    B. However he is late

C. However is he late    D. However late he is

(   ) 14. __________everybody knows about it,I don't want to talk any more.

A. For    B. Even C. Since    D. However