题干
It's so wise you to organize this trip. It's necessary us to go on a trip sometimes.
A：for; of
B：for; for
C：of; for
D：of; of
答案(点此获取答案解析）
C
It's so wise you to organize this trip. It's necessary us to go on a trip sometimes.
A：for; of
B：for; for
C：of; for
D：of; of
