—Have you known Dr. Jackson for a long time?—Yes, since she _________ the Chinese Society.
#104589
A
has joined
B
joins
C
had joined
D
joined
推荐题目
—The door is still open.—How come? I mean, I _________ to lock it then.
#100493
A
remembered
B
would remember
C
remember
D
had remembered
Thank you for helping me. I       the final exam without your timely help. 
#102591
A
have failed
B
will fail
C
would have failed
D
must have failed
Although he has lived with us for years, he _______ us much impression. 
#104769
A
hadn’t left
B
didn’t leave
C
doesn’t leave
D
hasn’t left