Fresh air, enough exercise and nutritious food ______ to sound health.
#100792
A
devote
B
add
C
contribute
D
stick
推荐题目
 As she _____ the newspaper, Granny _____ asleep.
#104166
A
read ; was falling  
B
was reading; fell
C
was reading; was falling
D
read; fell
—I phoned you at 9 this morning but got no answer.—I am sorry. I _____ the bell. I _____ in the garden.
#101559
A
didn’t have heard, must have been
B
didn’t have heard, must be
C
didn’t hear, must have been
D
didn’t hear, must be