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The first thing        we should do is to protect the wild animals .
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A
that
B
which
C
what
D
how
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Friends are those_____ make you smile, always open their hearts to you and encourage you to succeed.
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The man to ______ my father is speaking is my uncle.
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So Young, the movie ______ was filmed in Nanjing, is on in many cities.
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  I will never forget the town_________ I spent my childhood.
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