.You can see the stars on a clear night but in the daytime they areA. unavoidableB. invis

问题补充：

.

You can see the stars on a clear night ,but in the daytime they are

A. unavoidable

B. invisible

C. inaccessible

D. unavailable

答案：

A. unavoidable

(答案→)B. invisible

C. inaccessible

D. unavailable

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