The old man is used to _____ early in the morning.A.A.exercise B.B.exercising C.C.exercised D.D.exercises
问题描述:
The old man is used to _____ early in the morning.
A.A.exercise
B.B.exercising
C.C.exercised
D.D.exercises
答
B
理由:be used to 表示习惯性动作,而习惯性一般用ing形式来表示