问题
选择题
_____his father had come, his face lit up.
A．Having learned
B．When he learned
C．Heating
D．When learning
答案
答案：B
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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_____his father had come, his face lit up.
A．Having learned
B．When he learned
C．Heating
D．When learning
答案：B
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。