There are over ______ books of all kinds in the library.                                 
#51821
A
nine hundred of
B
nine hundreds
C
nine hundred
D
hundred of
推荐题目
This is the      time during      days that he has made the same mistakes. 
#51052
A
second; third
B
two; three
C
two; third
D
second; three
I think _____ of the materials I listen to at the beginning of the exam _____easy.
#51716
A
two thirds, is
B
second three, are
C
two thirds, are
D
two third, are
He has been running______.
#51530
A
since two hours
B
for two o’clock
C
two hours ago
D
for two hours
_________ should not be allowed to go out at night. 
#51907
A
Twelve-years-old
B
Twelve-year-olds
C
Twelveyearold
D
Twelveyearsolds