The course normally attracts 50 students per year, ()up to half are from overseas.
A.正确答案Bof them
B.of whom
C.of those
D.of which
The course normally attracts 50 students per year, ()up to half are from overseas.
The course normally attracts 50 students per year, ()up to half are from overseas.
A.正确答案Bof them
B.of whom
C.of those
D.of which