He promised his old friend during his stay in Tianjin.A. see B. seeingC. saw D. to see D [解析]试题分析:promise to do sth:许诺做某事.故选D 题目和参考答案——青夏教育精英家教网—

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He promised ________ his old friend during his stay in Tianjin.

A. see B. seeing

C. saw D. to see

D 【解析】试题分析：promise to do sth：许诺做某事。故选D

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