By the time you arrive in London, we ______ in Europe for two weeks. 
#104980
A
shall stay
B
have stayed
C
will have stayed
D
have been staying
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I won’t tell the student the answer to the math problem until he      on it for more than an hour.
#100166
A
has been working
B
will have worked
C
will have been working
D
had worked
---___ the sports meet might be put off.----yes, it all depends on the weather.
#104024
A
I’ve been told
B
I’ve told
C
I’m told
D
I told
--- Oh, dear. I forgot the air tickets. --- You ______ something.
#104280
A
have left
B
are always leaving
C
are leaving
D
always left