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-----of the twins has been here before.

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-----of the twins has been here before.
A.Neither
B.None
C.Both
D.Each
-----of the twins has been here before.
A,从twins(双胞胎)中可以看出是两个人 ,none是不行的,因为要用于3个人或以上的才行.Both的话就要用复数了,但后面有has been,所以也不能用.
至于最后的each,也是用于3个人或以上的.只有neither是讲两个人的,而且是否定.
____of the twins has been there before ______of the twins has been there before ________ of the twins has been to England. ___of the twins has been there before A all B Neither C Both _____ of the twins has been to new york a both b nobody c ne The twins have never been to England before ( ) 1.___of the twins has been to America. The biologist has been here for ______. 小学英语首字母填空1.She has been here s_____the beginning of the seme They must have been here the day before yesterday,---------- The twins ____ Canada for three weeks. A.has been to B.have 反意疑问句he has never been here before,______ he?