It’s the second time that I          in Beijing. What great changes! It’s years since I       here last time.
#101726
A
went; had left
B
had been; left
C
have been; left
D
have; have left
推荐题目
—Who do you think will get the first prize?     —Mary, of course. She ________ for the competition for months.
#100967
A
is preparing
B
was preparing
C
has been preparing
D
had been preparing
 I’m sorry I can’t join you.  I __________ my homework. 
#100217
A
haven’tfinished
B
didn’tfinish
C
won’tfinish
D
don’tfinish