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Every boy and girl ________ it.
[
A
B
C
D
If she the answer to the question, she would tell you.
A.knows B.will know C.have known D.knew
You need ________ about some table manners.
[ ]
Tom seems ______what he is doing.
A.to know B.knows C.knowing D.knew
The manager, like all his technicians, ________ how to operate the machine.
A.knew B.know C.knows D.will know