We will go for a picnic if it_____ this weekend. 
#36947
A
will rain
B
rains
C
won ’ t rain
D
doesn’t rain
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Mary with her sisters ________ Chinese in China.
#42691
A
are studying
B
have studied
C
is studying
D
study
Mr. Liu __________ for ten minutes.
#38631
A
has left
B
will leave
C
has been away
D
left