问题
选择题
They were singing and dancing to _____ their high spirits though it was very cold. [ ]
A. keep up
B. build up
C. bring up
D. pick up
答案
答案:A
They were singing and dancing to _____ their high spirits though it was very cold. [ ]
A. keep up
B. build up
C. bring up
D. pick up
答案:A