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