--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
----- I haven’t heard from Henry for a long time.----- What do you think ___________ to him?
#41739
A
has happened
B
to happen
C
was happening
D
had happened
 My grandma ______ to see me .Please help me to buy some food.
#40361
A
is coming
B
comes
C
came
D
coming
-How long has your grandpa ______?-For about 3 months. 
#39750
A
died
B
been died
C
been dead
D
death
---Could you tell me when your father___back?---I’m not sure now. but when he ___next week, I’ll tell you.
#41852
A
return, comes
B
will come, returns
C
comes, will return
D
will return, comes
When I _______ the farm, the children had finished _______ the apples.
#42069
A
reached, picking
B
got, picking
C
came, picked
D
arrived in, to pick