(    )10.Peter is ten years old. He is        to go to school.

     A.old enough     B.enough old    C.young enough   D.enough young

(    )11.—Does everyone        in our class like swimming?—Yes, they do.

      A.other     B.another    C.else    D.others

(    )12.They can’t sing. We can’t sing,       .

      A.too      B.also     C.neither     D.either