It’s so silly ________ people to buy and
题型：选择题
问题：
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
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