There are about _________ teachers and students in their school.
#51545
A
three thousands
B
three thousand
C
thousand of
D
three thousand of
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_____ of the land in that district ______ covered with trees and grass.
#51429
A
Two-five ; is
B
Two-fifth ; are
C
Two-fifths ; is
D
Two-fifths ; are
I’m ______ years old and it’s my ______ birthday today.
#51672
A
fifteen, fifteen
B
fifteen, fifteenth
C
fifteenth, fifteen
D
fifteenth, fifteenth
The earth is       years old.
#51891
A
four thousands six hundreds
B
four thousand six hundred
C
four thousand and six hundred million
D
four thousand six hundred millions
The girls have read ______ books. 
#51263
A
two hundreds
B
hundred of
C
two hundred of
D
hundreds of
There are ______ flowers in the square during the National Day.
#51746
A
million of
B
millions of
C
two millions
D
two millions of