问题

I failed in the final examination last term and only then ________ the importance of studies.

A:I realized
B:I had realized
C:had I realized
D:did I realize

正确答案是：

同类题型

they are fit, I see no reason why they shouldn’t go onplaying basketball for another four or five years

The young lady __________ we met yesterday is our new math teacher.

下列句子中的“之”字的用法和解释归类正确的一项是①胡为乎惶惶欲何之 ②水之积也不厚 ③覆杯水于坳堂之上 ④响穷彭蠡之滨⑤鹏之徙于南冥 ⑥楚之南有冥灵者 ⑦众人匹之 ⑧之二虫又何知⑨知来者之可追 ⑩报养刘之日短也 ⑾句读之不知 ⑿蚓无爪牙之利，筋骨之强

You ought to hwhat I asked

I’m sure your suggestion will ______ the problem.