问题: He was _______ the preparation of an international
He was _______ the preparation of an international conference when I arrived in Beijing.
A. engaged to
B. engaged for
C. engaged on
D. engaged in
解答:
选D。题意为:我到北京时,他正忙着准备一个国际会议。
D.be engaged in 正做着、正忙着,与题意相符
A.be engaged to 与……订婚,与题意不符
B.engage for 允诺、保证,与题意不符
C.be engaged on 着手(某事),从事(某事)
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