Some of you may have finished unit one. _____ , you can go on to unit two. 
#84634
A
If you may
B
If you do
C
If not
D
If so
推荐题目
Not until the motorbike looked almost new _________ repairing and cleaning it.
#84501
A
he stopped
B
did he stop
C
stopped he
D
he did stop
—Serina has been watching the TV series the whole night.— ________.
#79567
A
So her parents have
B
So have been her parents
C
Her parents have been so
D
So have her parents
It was not until 1978_____ set free from the prison.
#80908
A
that the old professor was
B
did the old professor
C
was the old professor
D
that was the old professor