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
The guests were _________ in the front rows ________ to the president attentively.
#36726
A
seating; listened
B
seating; listening
C
seated; listened
D
seated; listening
What          at that time ? ---Playing football.
#39891
A
did you do
B
do you do
C
were you doing
D
are you doing