1.Mr.Smith won't be here next week and his wife won't either.
答案：his wife won't either
解析：
A.his wife won't neither 不正确,用 heither 表示“也不”的句子必须倒装,另外 neither 已经有了否定的含义,用 won't 否定重复,正确的说法是 Neither will his wife.
B.his wife won't either 形式正确,不需要倒装,ther 前的逗号可以省略
C.neither his wife will 倒转句的助动词必须提前到主语前,正确的说法是 Neither will his wife.
D.neither his wife won't,neither 倒是提前了,但是还有两处错误,一处是倒装句的 won't 没有提前,一处是存在双重否定.
2.The young woman ___in red is ___her three-year-old son.
答案：C.dressed; dressing
解析：
1) dress 是及物动词,宾语应该用人来充当,意思是给某人穿衣；
2) 给自己穿是 dress oneself,变为被动即为 one is dressed.第一空是过去分词短语作后置定语,被动用法,因此要用 dressed in red；
3）第二空,正给她三岁的儿子穿衣,应该用 is dressing her three-year-old son.
4) put on 指穿衣的动作,宾语应该是衣服,不能用人；
5）wear 指穿好衣服后的状态,宾语也应该是衣服.