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--- Shall we call on Frank tonight?---We’d better not. He is said a lecture.A.pr

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--- Shall we call on Frank tonight?---We’d better not. He is said a lecture.A.pr

--- Shall we call on Frank tonight?

---We’d better not. He is said ________ a lecture.

A.preparingB.to be preparingC.to have preparedD.having prepared

试题答案

B

解析