单项选择题
A.in time of B.in case of C.in terms of D.in honour of
Although recent years have seen（）reductions in noxious ...
单项选择题Although recent years have seen（）reductions in noxious pollutants from individual motor vehicles, the number of such vehicles has been steadily increasing.
A.substantial B.substance C.submit D.subjective
The number of such vehicles（）steadily increasing.A.have...
单项选择题The number of such vehicles（）steadily increasing.
A.have been B.had been C.having been D.has been
The casual attitude in the US does not mean（）no hierarc...
单项选择题The casual attitude in the US does not mean（）no hierarchy in US companies.
A.that is B.there is C.there are D.that are
