问题

It was not until I failed in the test ______ I realized I had wasted too much time instead of preparing for it fully.

A:did
B:before
C:that
D:where

正确答案是：

同类题型

Facing the emergence, we were at a loss and none of us could ______ a solution to the problem.

He doesn’t know_______.

The Chinese Vice-President Xi Jinping_______ visit the United States on Feb 13 on a three-country tour

They ____ repairing the wall. The _____ wassmooth（顺利）.

I’ve told her many times, and she stillforgot about it!—I understand. It’s true that she___ be veryforgetful sometimes.