_____is a good of exercise for both the young and the old.
#98386
A
The walk
B
Walking
C
To walk
D
Walk
推荐题目
Don't speak until ___ to.
#98117
A
spoken
B
speak
C
speaking
D
to speak
He had learnd ___ such things, so he refused ___.
#97753
A
to do, being taught to
B
doing, to be taught to
C
to do, to be taught to
D
doing, being taught to