1.　　　 To be honest, I can’t tell what the a________ of this building is.

20.　 He struck me with his _______(拳头).

Unit 22

19.　 Don’t do that, it’s u______.

18.　 Please _____(聚焦) your minds on the following problem.

17.　 Don’t let the mistake o_____ again.

16.　 He filled with a______ at the way he had been tricked.

15.　 It seems that the flowers here speak to each other g______ at night.

14.　 He felt a t_____ on his shoulder.

13.　 She b_____ down and picked up a pen.

12.　 Many old buildings here will be t______ down soon.