We __________ in the same school since three years ago. 
#38230
A
study
B
were studying
C
will study
D
have studied
推荐题目
. The train _____ for twenty minutes.
#41504
A
left
B
has left
C
is leaving
D
has been away
I don’t remember when and where I __________ this umbrella.
#41569
A
buy
B
have bought
C
will buy
D
bought