I think _________ of the materials I listened to at the beginning of the exam __________ easy. 
#51178
A
two thirds; is
B
second three; are
C
two thirds; are
D
two third; are
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I have          aunts, and my          aunt works in Nanjing.
#51778
A
two; two
B
two; second
C
second; two
D
second; second
This is       river. Few of us can swim       it, I think.
#51656
A
a 800-foot-wide; over
B
an 800-foot-wide; across
C
a 800-feet-wide; over
D
an 800-feet-wide; across
Sally and I are in ______.
#51578
A
class two
B
Class Two
C
Two Class
D
two class