– I’m leaving for Beijing next week.– How long ______ there?
#101707
A
have you stayed
B
are you staying
C
had you stayed
D
did you stay
推荐题目
As time ________ on, Sally began to wonder if Bruce ________ Bilks’new poem called Tabled’Hute. 
#104780
A
has gone; had read
B
went; has read
C
goes; has read
D
went; had read
The student didn’t pay any attention to the lecture; he ________ of something else. 
#104749
A
thought
B
had thought
C
would think
D
was thinking
I won’t tell the student the answer to the math problem until he ____on it for more than an hour.
#99288
A
has been working
B
will have worked
C
will have been working
D
had worked