Our school has a big library. There are about ten        books in it.
#51557
A
thousand
B
thousands
C
thousand of
D
thousands of
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There were          different kinds of dinosaurs in the word in the past.
#51715
A
hundred of
B
two hundred of
C
hundreds of
D
two hundreds of
—Is Mary         ? —No, she is a          girl.
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A
twelve years old; fourteen years old.
B
twelve years old; fourteen -year -old.
C
twelve - year - old; fourteen years old.
D
twelve - year - old; fourteen - year -old.
 There are about ______ people in this town.
#51468
A
five millions
B
million of
C
five million
D
five millions of
-Can I spend ______ minutes in bed?-Sorry, you can’t.
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A
ten more
B
more ten
C
other ten
D
ten another
He has been running______.
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A
since two hours
B
for two o’clock
C
two hours ago
D
for two hours