问题

Only when he failed ______ the stress he was under.
A:he realized
B:did he realize
C:realized he
D:he did realize
B:did he realize
C:realized he
D:he did realize
正确答案是:
同类题型
Kitty is _______.But her sister is tall.
________ the bridge, and you’ll see the elephants.
There can be no life on the earth without water. —-That’s right. Water _____ everywhere.
The doctors said that there was ___ wrong with Jane’s legs, but they could do ___ to help her.
Who is girl reading under the tree?—She is Liu Mei. She wrote unusual book about the school life.