--When did you become a volunteer for the elderly?-- Two years ago. I ______ this group since then.
#41941
A
joined
B
took part in
C
have joined
D
have been in
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I don’t know when he _________ tomorrow. If he _________, I’ll let you know. 
#40387
A
comes, comes
B
will come, comes
C
comes, will come
D
came, will come
—What did you do last Sunday?    — I       .
#40644
A
went to the movies
B
stay at home
C
do some reading
D
am visiting my friends
 Unless it ______, we’ll visit Hangzhou Wild Animal Park this weekend.         
#36858
A
rains
B
will rain
C
doesn’t rain
D
isn’t raining
Your donation_________ and the money will be used to help the students from poor families.
#42240
A
is greatly appreciating
B
appreciates
C
has appreciated
D
is greatly appreciated