单项选择题
A.carry around them. B.carry them around C.carry them with D.carry with them
A.best-sold B.best-sell C.best-sale D.best-selling
A.thought B.idea C.opinion D.views
A.While B.When C.As D.If
A.It is useless to complain. B.It is useless complaining. C.Complaining is useless. D.It is useless of complaining.
A.for B.on C.of D.about
A.a many difference B.much difference C.many difference D.much a difference
A.essays B.files C.documents D.records
A.tune B.tunes C.the tune D.a tune
A.as result B.as a result of C.as the result of D.a result of
A.great advancesin B.a great advancein C.great advanceon D.a great advanceon