Question

【题目】-- What should I do, doctor?
-- __________ healthy, you should take more exercise.
A.Keep
B.Keeping
C.To keep
D.Having kept

Answer 1

【答案】C
【解析】句意：——我该怎么办，医生？——要保持健康，你应该多锻炼。动词不定式作目的状语，表示“为了……”因此选C。