The factory produces half a million pair
问题:
The factory produces half a million pairs of shoes every day, 85% ____ sold abroad.
A.of them are
B.of them is
C.of which is
D.of which are
The factory produces half a million pairs of shoes every day, 85% ____ sold abroad.
A.of them are
B.of them is
C.of which is
D.of which are