Ann is a careful girl．She always goes over her exercises to ____ here are no mistakes．
#56144
A
look for
B
make sure
C
find out
D
think about
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―Do you prefer spring ________ summer?―________, because it’s warm and flowers start to come out．
#60577
A
to, Yes
B
or, Yes
C
to, Either
D
or, Neither
—Could you please ________ the window? It’s cold outside.—Oh, I’m sorry.
#58716
A
not to open
B
not open
C
don’t open
D
to not open