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set off
[ ]
A. 动身 B. 建立 C. 释放 D. 外出
this set of keys yours?
A set of keys _____ on the table. Can you see _____ .
A . is, it B. is, them C. are, it D. are, them
My set of keys old, but your keys are new.
A．am
B．is
C．are
D．be
A. am B. is C. are D. be