并说明理由
Bill is ill.Do you know what's wrong with him?
Poor boy.His illness is the（ ）of eating unhealthy food.
A.result B.cause
C.reason D.end
Your son doesn't get up early,does he?
( ).But he gets up late on weekends.
A.Yes,he does.B.No,he doesn't.
C.Yes,he doesn't.D.No,he does.
Take your medicine,(
A.will you B.do you
C.don't you D.shall we
All ( ) is needed is a supply of water.
A.the thing B.that
C.what D.which