--When did you become a volunteer for the elderly?-- Two years ago. I        this group since then.
#42442
A
joined
B
took part in
C
have joined
D
have been in
推荐题目
When I went to say goodbye to Ann, she ______ the piano.
#41656
A
plays
B
played
C
has played
D
was playing
—Are you still busy ?—Yes, I _______ my work and it won’t take long .
#41837
A
just finish
B
am just finishing
C
have just finished
D
finished
When we hurried to the meeting room, the meeting _______.
#39527
A
had begun
B
had been on
C
has begun
D
has been on
Lisa wrote a letter in the morning, but Bob _______.
#41603
A
doesn’t
B
don’t
C
didn’t
D
wasn’t