The workers ___ busily when the boss came to look for something she ___ in the office.
#103985
A
had worked; had left
B
were working; had left
C
working; had left
D
had worked; left
推荐题目
This is the first time that I _____ at the meeting.
#102465
A
had spoken
B
have spoken
C
spoke
D
speak
I would have come earlier, but I _____ that you were waiting for me.
#102993
A
didn’t know
B
hadn’t known
C
haven’t known
D
wouldn’t have known
 In no time ________ smoke coming out of the house.
#101549
A
did we see
B
we saw
C
are we seeing
D
we see
It’s said that a car accident_____________on the highway this morning. 
#104050
A
happens
B
happened 
C
was happened
D
has been happened