灭亡西周的少数民族是[ ]
A．匈奴
B．汉族
C．犬戎
D．鲜卑
答案：C
氧化塘的特点是构筑物简单、（）、运转管理方便。
Most Chinese children like to sleep with their mothers. They are ___the
dark the dark. [ ]
A. interested in
B. afraid
C. terrified of
D. sure of
