—What’s this? —It’s a machine which was invented in __________century in China.
#51455
A
six
B
sixth
C
the six
D
the sixth
推荐题目
People usually think lions are _____ scary.
#51742
A
kinds of
B
kind
C
a kind of
D
kind of
Don’t worry. There’s _________ time left.
#51763
A
little
B
a few
C
few
D
a little
There are ______visitors in Hangzhou every year.
#51629
A
million of
B
millions of
C
million
D
milliones of
About _____ of the world population is Chinese. 
#51889
A
one third
B
one fourth
C
one fifth
D
one sixth