his father had come, his face lit up.A. Having learnedB. When he learnedC. HeatingD. When

发布时间：2020-08-17 12:11:13

    his father had e, his face lit up.
A. Having learned
B. When he learned
C. Heating
D. When learning

网友回答

A. Having learned
(答案→)B. When he learned
C. Heating
D. When learning
解析：主句的主语是his face，因此，不能用分词短语，只能用状语从句。故B正确。
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