单项选择题

At the meeting both sides exchanged their views on a wide () of topics they were interested in.

A.extent 
B.number 
C.collection 
D.range

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--Have you moved into the new house--Not, yet. The rooms ()now.

A. were painted           
B. have painted
C. are being painted         
D. are painting
单项选择题
Modern forms of transportation and communication have done much to () the isolation of life in Alaska.

A. break down 
B. break into  
C. break out  
D. break through
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