问题
选择题
Mrs Smith had to ______ her father day and night because he was seriously ill.
A. look at B. look like C. look after
答案
答案：C
题目分析： look at 看，look like像，look after照看，照顾。have to必须，不得不。句意：史密斯夫人必须日夜照顾她的父亲，因为他病的很严重。故选C。