作业帮______ to somebody,a British person often shake hands.A) On being introduced B) On introducingC) When introducing D) While introducing
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______ to somebody,a British person often shake hands.
A) On being introduced
B) On introducing
C) When introducing
D) While introducing
on doing sth.意思是“一……就……”当英国人被介绍给别人时,通常会握手.
on when while都可以 这句的关键是要用be introduced to sb. 所以A