What ________ if there ______ no water or air on the earth?
#39823
A
happen, is
B
will happen, is
C
will happen, will be
D
happen ,are
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Mary ______ in Beijing since 2008.
#39884
A
have lived
B
is lived
C
lived
D
has lived
Mr Li ________ . 
#42495
A
teach me English
B
teach my English
C
teaches me English
D
teaches my English