题目内容
Never form the habit of smoking because it ______ human beings.
A.is harmful to B.does harm for
C.is harm for D.does harmful to
A
Never form the habit of smoking because it ________ human beings.
is harmful with
does harm to
is harm for
does harmful to
does harm with
is harmful to
A. does harm with B. is harmful to C. is harm for D. does harmful to