问题
选择题
—Doctor, I am afraid I am getting fat these days.
— _____ slim, you should change your diet and lifestyle.
A．Keeping
B．Keeps
C．Keep
D．To keep
答案
答案：D
题目分析：句意：医生，恐怕这些天我又吃胖了。为了保持苗条，你应该改变你的饮食和生活习惯。To do 不定式表目的，为了.....