Miss White please keep visitors off the meeting-room. A secret plan there.A. is madeB. wa

问题补充：

Miss White, please keep visitors off the meeting-room. A secret plan there.

A. is made

B. was made

C. is making

D. is being made

答案：

A. is made

B. was made

C. is making

(答案→)D. is being made

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