My father and my mother have been married for 30 years, and never once ______ with each other.
#99794
A
they have quarrelled
B
did they quarrel
C
had they quarrelled
D
have they quarrelled
推荐题目
—When are you leaving for Guangdong?—My plane        at six.
#99376
A
took off
B
would take off
C
will take off
D
takes off
--- Are we about to have dinner?  --- Yes, it _______ in the dining room. 
#102786
A
is serving
B
serves
C
is being served
D
served
Mr. Black _____ for Shanghai in a few days. Do you know when the earliest plane _____ on Sunday. 
#101752
A
leaves; takes off
B
is leaving; takes off
C
is leaving; is taking off
D
leaves; is taking off