问题
选择题
It’s so silly ________ people to buy and store so much salt. It’s necessary ________ them to learn more about salt.
A．for; for
B．for; of
C．of; of
D．of; for
答案
答案：D
表示对于某人进行评价，用It’s +adj+of sb +to do sth，而对于做某件事是怎样的用句型It’s +adj+for sb to do sth，故选答案为D