.________they were singing, the teacher came in. 
#72179
A
Before
B
after
C
As
D
Until
推荐题目
 ______, don’t be surprised.
#68328
A
Whatever happens
B
Whatever does it happen
C
Whatever will it happen
D
Whatever may it happen
They have no idea at all  ________. 
#68950
A
where has he gone
B
where did he go
C
which place he has gone
D
where he has gone