With Shanghai World Expo drawing near, volunteers are making use of every minute to ____ their foreign language because language volunteers must pass a written test and an interview. 
#71788
A
polish up
B
take up
C
use up
D
make up
推荐题目
Everyone says our team will win,but I               it.
#82031
A
sceptical of
B
am sceptical
C
sceptical about
D
am sceptical about
John speaks English ___________, if not better than, David.
#65867
A
as well
B
as well as
C
so well
D
so well as