题干
He was about to cross the street ______ he heard his name ______.
A：when; called
B：if; calling
C：and; calling
D：till; called
答案(点此获取答案解析）
A
He was about to cross the street ______ he heard his name ______.
A：when; called
B：if; calling
C：and; calling
D：till; called
