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新概念第二册练习册第21课答案

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新概念第二册练习册第21课答案
新概念第二册练习册第21课答案
A:2 must be written 3 it won't be opened 4 mustn't/must not be used 5 it would be done 6 has to be explained 7 can't/cannnot be found 8 must have been done 9 might have been repaired 10 can't/cannot be done
B:can be repaired,will be repaired by saturday,could be done
C:1.understand 2.realize 3.offered 4.house 5.home 6.determined 7.drove 8.driving
D:1 An American cat.
2 Next to a plane at Chicago Airport.
3 The cat was sucked into the plane.
4 It went to zurich,Liberia and then back to Zurich.
5 He said they could hear noise.
6 It has been taken home by an employee at Zurich Airport and has been named "jumbo"