单选题
(When) I heard the principal (called) my name, I walked to (the) front (to receive) my diploma.
A、
When
B、
called
C、
the
D、
to receive
【正确答案】
B
【答案解析】
called改为calling。hear sb. doing sth.是固定表达方式,“听到某人做某事”。
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