Sound travels____thanlight.
A. slow
B. slower
C. slowest
D. slowly
Do you know anything ____ basketball stars?
A. for
B. in
C. about
D. by
United by emotion 正确的译文是____?
A. 联合情感
B. 欢乐聚会
C. 激情运动
D. 激情聚会
healthy的反义词是____?
A. unhealthy
B. inhealthy
C. abhealthy
D. dishealthy