问题
选择题
31. A wonderful idea suddenly occurred to me _______ I would turn to the reference book to finish my homework
A．that
B．if
C．when
D．Which
答案
答案：A
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31. A wonderful idea suddenly occurred to me _______ I would turn to the reference book to finish my homework
A．that
B．if
C．when
D．Which
答案：A