138. --- Can you tell me what time No.172 arrives?--- Sorry I’m not sure of the time. It

问题补充：

138. --- Can you tell me what time No.172 arrives?

--- Sorry, I’m not sure of the time. It is said that it is postponed.

A. Plane

B. Flight

C. Flying

D. Aircraft.

答案：

A. Plane

B. Flight

C. Flying

D. Aircraft.

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