选字填空。
绝 决
( )定 断( ) ( )望 坚( ) ( )心 ( )对
筹 愁
一( )莫展 ( )眉苦脸 ( )备 发( ) ( )苦
决 绝 绝 决 决 绝
筹 愁 筹 愁 愁
某中学共有学生1624人,已知男生人数与女生人数的比是5:3,男女生各有多少人?
Mary's laughter seemed to be , and soon all her team began to cheer up. [ ]
A. generous
B. nervous
C. ridiculous
D. infectious