It is thought that one billion people I
题型:选择题
问题:
It is thought that one billion people I the world, _ is half the word’s workers, earn their living by farming.
A.if
B.that
C.which
D.what
It is thought that one billion people I the world, _ is half the word’s workers, earn their living by farming.
A.if
B.that
C.which
D.what