Which of the following sentences is INCORRECT?

A、 There are flowers on both the sides of the street.
B、 The headteacher says they both can play soccer well.
C、 Mrs. Smith can speak both English and Chinese.
D、 Tom and Jim are both my good friends.

【正确答案】 A

【答案解析】考查both的用法。both作前置定语单独修饰复数名词时，名词前不能有其他限定词修饰，但也可以构成“both of+其他限定词+复数名词”或“both of+代词”结构。故A错误，正确表达应为both sides或both of the sides。当both作副词用时，一般位于助动词/情态动词／行为动词之前，而be动词则之后或之前均可，如B、D。选项C属于both．．．and…结构。