8 billion 不可数名词
例如:
The dictator and his cronies had milked their country of somewhere between$5 billion and$10 billion(Russell Watson)
独裁者及他的亲信从他们的国家榨取大约50亿
That country's debts bulk up to four billion US dollars.
那个国家负债达40亿美元。
8 billion or 8 billions 八十亿或八十亿
百、千、百万、十亿等数量词都不是用复数的,所以选A
不过用在词组hundreds of;thousands of 时,要用复数,加数字时要写单数
1,000 = one thousand 一千
10,000 = ten thousand 一万
100,000 = one hundred thousand 十万
1,000,000 = one million 一百万
10,000,000 = ten million 一千万
100,000,000=one hundred million 一亿
8 billion