（ ）5.- ________ the man there be our maths teacher?
-He ________ be,but I’m not sure.
A.May,can’t B.Can,can’t C.Can,may D.May,mustn’t
（ ）7.If you want to be ________,you must take more ________.
A.healthy,exercise B.health,exercise C.healthy,exercises D.health,exercises