问题

Not until all the fisli died in the river _____ how serious the pollution was.[ ]

A: did the villagers realize
B: the villagers realized
C: the villagers did realize
D: didn't the villagers realize

正确答案是：

同类题型

—Did Alice enjoy the concert held in Grand Theater yesterday?—Yes, she did. She ______ such an excellent concert for a long time.[ ]

At the foot of the mountain________.

Mr. Smith is ______ old man and he usually walks with his dog after______ supper.

The excellent service of the waiters __________highly praised.That’s why the restaurant is always full of people.

How did the concert ______ you? —I wish I could hear it one more time.