29.She has two best friends.of them is in the country.
问题描述：
29.She has two best friends.of them is in the country.
A.All B.Both C.No one D.Neither
要原因
答
当然是选D啦
先用排除法：前一句是说有两个朋友.在英语中,能够指two的一般肯定用both,否定neither（两者选一）.
All一般指代全部、全体,一般是指三者或以上,所以排除.
No one表否定,但英语中没有no one of them这种说法,但是可以说none of them(三者或三者以上),所以排除.
只剩答案B和D了.再看后一句中的谓语,是is,主语应为单数名词,所以肯定是D啦.如果选B的话,第二句的主干应该是Both(两者都) of them are in the country.