It’s the second time that I _______ in Beijing. What great changes! It’s years since I ________ here last time.
#4823
A
went; had left
B
had been; left
C
have been; left
D
have; had left
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At a rough estimate .Nigeria is           Great Britain.
#4872
A
three times the size as
B
the size three times of
C
three times as the size of
D
three times the size of
Just as music as a universal language, _____. 
#5004
A
so it is a mirror of the time
B
as a mirror of the time
C
it is also a mirror of the time
D
so is a mirror of the time