单句改错 下列各句中均有一处错误 请指出并改正

单句改错 下列各句中均有一处错误 请指出并改正 1)what’s（A）the matter（B）to（c）you（D）?_________2)my father aften (A) eats(B)too many (c)food(D)__________3)we are (A)tired (B),so we want (c) to have rest(D)_________4)lf you want to (A)stay health (B),you must (c)take some exercise(D)__________5)the old man(A)might(B)is (C)a doctor(D)___________