Question

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

Answer 1

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。"