This ( 选项 ) my pencil case.A.no is B.isn't C.is no D.not is

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This ( 选项 ) my pencil case.A.no is B.isn't C.is no D.not is

This ( 选项 ) my pencil case.A.no is B.isn't C.is no D.not is
This ( 选项 ) my pencil case.
A.no is B.isn't C.is no D.not is

This ( 选项 ) my pencil case.A.no is B.isn't C.is no D.not is
B
英语系动词表否定的时候,为be not,即is not,简写为isn't