问题

Not until the exam the importance of doing homework. [ ]

A: had he failed; he realized
B: he had failed; did he realize
C: he had failed; he realized
D: had he failed; did he realize

正确答案是：

同类题型

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do you find the town youvisited yesterday— The town has changed out of all______ in the past 20 years, a completely new one in front of me

There are many trees on ________ side of the street.

learned a lot about Asian customs, ______in the small village for three years in the early 1990s

he realized I _______ her, shequickly made a pose, smiling.