帮我看看两道英语单选～
问题描述：
帮我看看两道英语单选～
It is reported that____the Air Force about 000000 a year.Really a problem,isn't it?
A bird hit cost B birds hit cost
C bird hits cost D bird hit costs
答案是C B 为什么不行?
2．Ships must have more than one redio operator_______someone is always awake to recieve message 24 hours.
A if B since C while D So
答案是C WHY?
答
第一题：从语言学的知识来讲,bird hit是一个合成词(compound word),分析它的深层结构,hit是它的中心语(head),bird是hit的修饰成分(modifier),这类词在变复数的时候只把中心语变成相应的复数就可以了.第二题：根据后...