______ is a good form of exercise for both the old and the young.
#88215
A
Walk
B
To walk
C
Walking
D
The walk
推荐题目
I don’t allow __ in my drawing-room. I don’t allow my son __ at all.
#97403
A
to smoke; smoking
B
smoking; to smoke
C
to smoke; to smoke
D
smoking; smoking
The headmaster hurried to the concert hall only _________ the speaker 
#98777
A
to find; left
B
to find; gone
C
finding; left
D
finding; gone