单项选择题
The rain was（）make our picnic impossible.
A.hard enough
B.hard so to
C.so hard as to
D.so hard to
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单项选择题
The radio is too noisy, please（）.
A.turn down it
B.turn it down
C.turn off it
D.turn it up -
单项选择题
The public store is to close at 9:30 p.m. （）no need to worry; it is just 7:30 p.m.
A.You have
B.They have
C.It is
D.There is -
单项选择题
The population of the earth（）increasing fast.
A.is
B.are
C.were
D.have been
