问题补充:
.It’s important us students carefully in class.
A. for; listening
B. of; listen
C. for; to listen
D. of; to listen
答案:
A. for; listening
B. of; listen
(答案→)C. for; to listen
D. of; to listen
解析:句意:我们学生在班上认真听讲是非常重要的。It is important for sb to do sth某人做某事是重要的,其中for sb to do sth是不定式复合结构作句子的真正主语。如:It is important for us to protect the environment我们保护环境是非常重要的。其他用于本句型的形容词还有:necessary,natural,strange等。故选C。