— ______sleep do you think is necessary for a Grade 9 student? — 8 hours at least. 
#37367
A
How often
B
How long
C
How many
D
How much
推荐题目
I like penguins because they are ______ interesting.
#43878
A
a kind of
B
kinds of
C
kind of
D
kind
It _______ me 20 minutes _______ to the park.
#43308
A
spends ; to walk
B
spends ; walking
C
takes ; to walk
D
takes ; walking
_________ people were found ________ after the big earthquake.
#43574
A
A number of; died
B
The number of; died
C
A number of; dead
D
The number of; dead