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单项选择题
A.right and wrong
B.back and forth
C.ups and downs
D.right and left
单项选择题
A.is going to be
B.is going to have
C.is going to is
D.is going to has
单项选择题
A.must be
B.can be
C.would be
D.could be
单项选择题
A.as long as
B.while
C.if
D.even though
单项选择题
A.wide
B.so wide
C.wide enough
D.enough wide