问题
选择题
_______ to the sun, rain and wind for a long time, the stone split.
[ ]
A. Expose
B. Exposed
C. Exposing
D. To expose
答案
答案：B
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_______ to the sun, rain and wind for a long time, the stone split.
[ ]
A. Expose
B. Exposed
C. Exposing
D. To expose
答案：B