问题补充：
His father likes keeping dogs and.
A. his mother likes so
B. so his mother
C. so his mother does
D. so does his mother
答案：
A. his mother likes so
B. so his mother
C. so his mother does
(答案→)D. so does his mother
解析：“so＋助动词（情态动词或连系动词）＋另一主语”，此句型是主谓倒装结构，可以表示前面的情况也适用于后者，使用该句型需要注意以几个方面的问题： 1．该句型只能用于肯定句，不能用于否定句：如果前句是否定句，则要用“neither /nor ＋助动词＋主语”。 2．句型中的主语与上文中的主语是不同的两个主语3．句型中助动词，包括连系动词和情态动词的时态要和上句中谓语动词的时态相一致。
句意：他的父亲喜欢养狗，并且他的母亲也是。结合语境可知前文情况也适用于后者,故用主谓倒装结构,选D.
