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.Someone is at the door, who is_________?
A. this B .that C. it D. He
19..Someone is at the door, who is_________?
20.
A．this
B．that
C．it
D．He
. Someone is at the door, who is ?
A.this B.that C.it D.he
19..Someone is at the door, who is_________?20.
Someone is at the door, who is ?