the sound of the terrible noise, the little baby burst into tears.
A.On
B.By
C.At
D.Upon
答案:C
按烧伤严重程度分类
A.轻度
B.中度
C.重度
D.特重度
E.以上都不对
Being young means having all kinds of possibilities, so you should challenge your limits and go ______ your boundaries.
A.beyond
B.for
C.over
D.above