单项选择题
A.bare B.blank C.hollow D.empty
These plants are rather difficult（）A.to look afterB.to ...
单项选择题These plants are rather difficult（）
A.to look after B.to be looked after C.being looked after D.looking after
The act of speaking will also help to improve listening...
单项选择题The act of speaking will also help to improve listening comprehension（）
A.to some way B.in the way C.to some extent D.in the extent
They walked（）the woods.A.upB.downC.throughD.over
单项选择题They walked（）the woods.
A.up B.down C.through D.over
