Do you know the Three Gorges Dam is the largest hydro-electric dam ever_______?
A．constructed B．constructing
C．to be constructed D．been constructed
English is a language shared by several different cultures, but each of ______ uses it somewhat differently.
A．which B．what C．them D．whom
Have you ever had the case _______ you can’t recognize your friend’s voice on the phone?
A．which B．that C．where D．when
He made another wonderful discovery,_____ of great importance to science.
A．which I think is
B．which I think it is
C．which I think it
D．I think which is
When the poor old lady tried to ______ the cup on the shelf to have a drink, she ______.
A．reach for; fell down B．reach; fell down
C．reach for; had fallen down D．reach; was falling down
Maria has written two novels, both of _____ have been made into television series.
A．them B．that C．which D．what
