__ we admit that ther are still some problems,we don't mean that it is of mo use.
__ we admit that ther are still some problems,we don't mean that it is of mo use.
a.uhtil
b.while
c.as
d.unless
我知道答案选b,但是不能很好地解释.
难道就是根据他们不同的意思么?
a.uhtil
b.while
c.as
d.unless
我知道答案选b,但是不能很好地解释.
难道就是根据他们不同的意思么?
英语人气：871 ℃时间：2020-04-04 14:10:15
优质解答
只有while有表示语意转折的功能.
我来回答
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