The doctors say that good diet, exercise and fresh air, all of which _____ the health and long life. 
#80948
A
lead to
B
refer to
C
stick to
D
contribute to
推荐题目
How did all these _________?
#69492
A
came out
B
come up
C
come across
D
come about
All passengers ___ to show their tickets next time.
#81088
A
require
B
will require
C
are required
D
are to require