问题
Not once ________ to Michael that he could one daybecome a top student in his class.
A:occurred it
B:it did occur
C:it occurred
D:did it occur
B:it did occur
C:it occurred
D:did it occur
正确答案是：
同类题型
Students should pay attentions to ________the teachers in class.
Sorry, I don’t know what the teacher said just now.—-He asked Maria ________.
He always with his brother about some little things, and their mother is angry with them.[ ]
I sent ______ e-mail to Amy to say thanks for her help with my study.