Two girls came and I give an apple to ______of them.
A. every
B. every one
C. each
D. all
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____ of us has faults and shortcomings.
A. Everyone
B. Every one
C. All
D. Both
By 2020, production in the area is expected to double _____ of 2018.
A. it
B. one
C. that
D. what
"Someone is knocking at the door.""Who can __ be?"
A. he
B. she
C. it
D. they
I'd appreciate ___ that you could let me know in advance whether or not you will come.
A. them
B. it
C. him
D. her