29.The best times to visit Shangri-la spring and autumn because the temperature is its mildest. A.is:in.B.are,in C.is,at D.are,at 查看更多

 

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The best times to visit Shangri-la ______ spring and autumn because the temperature is _____ its mildest.

[      ]

A. is: in
B. are; in
C. is; at
D. are; at

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