选出不同类的一项。(10分)
(   ) ⑴ A. strong       B. stronger          C. longer
(   ) ⑵A. taller       B. shorter          C. small
(   ) ⑶A. on            B. short            C. shorter
(   ) ⑷A. 156cm        B. 1.65m            C. 155cm
(   ) ⑸A. happy         B. healthy           C. heavy