Paper money was in_______use in China when Marco Polo visited the country in________thirteenth century. 
#8010
A
the;x
B
the;the
C
x;the
D
x;x
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There was ____time _____I hated t go to school. 
#10436
A
a ,that
B
a ,when
C
the ,that
D
the ,when
I have worked with him for some time and have found that he is ________ than John.
#7877
A
more efficiently a worker
B
a more efficient worker
C
more an efficient worker
D
a worker more efficiently