问题

It ____ that all the students were having lessons in the teaching buildings when the earthquake occurred.[ ]
A: happens
B: was happened
C: happened
D: was happening
B: was happened
C: happened
D: was happening
正确答案是:
同类题型
I hear you won the football game yesterday. was the score—2∶0.
Thank you for______ me______ my bike riding.- You’re welcome.
Sales director is a position ______ communication ability is just as important as sales [ ]
He burnt all the important documents____that they should fall into the enemy’s hands