Sam ______ coins since he was eleven years old, and now he has hundreds of them.
#42209
A
collected
B
had collected
C
has been collecting
D
had been collecting
推荐题目
I will tell my daughter as soon as she _________ back from work.
#36810
A
will come  
B
would come
C
comes  
D
came
 His sister___________ her hometown for two years. She’ll return next year.
#42514
A
has been away
B
has left
C
has been away from
D
left
My uncle’s plane ____. Let’s wait for him here. 
#42041
A
hasn’t arrived
B
didn’t arrive
C
doesn’t arrive
D
couldn’t arrive
I      my homework, I guess I can't join you.
#42122
A
don't finish
B
didn't finish
C
haven't finished
D
won't finish