— ______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
Their ________say Chinese people are very ________.
#40106
A
friends…friendly
B
friend…friendly
C
friendly …friends
D
friends…friends
          , all of us agreed to go there with her.
#35626
A
To her surprise
B
To her surprised
C
To she surprise
D
To she surprised
They go to school ________.
#42132
A
take a boat
B
by a boat
C
by boats
D
by boat