问题
选择题
We all know that drinking too much _____ our health, but some people don’t care.
A．is harm to
B．does harmful to
C．is harmful to
D．do harm to
答案
答案：C
考察harm的用法。Do harm to ="be" harmful to 对……有害，该句主语是drinking too much,单数，所以选择C
句意为，我们都知道饮酒过多对我们的健康有害，但是很多人不在乎。