His children are well-behaved,_____those of his sister’s are very naughty.

问题描述:

His children are well-behaved,_____those of his sister’s are very naughty.
 A.and B.so C.thus D.while
请帮我分析下,

D 而
他的孩子表现很好,而他姐姐家的孩子很调皮.
(A表示顺承;B所以‘ 表示因果; C因此)