Question

【题目】I think _______ is important for us to go to bed early every night.
A.it
B.that
C.one
D.this

Answer 1

【答案】A
【解析】句意：我认为每天晚上早点上床睡觉对我们很重要的。句型：It's+形容词+for/of sb+to do sth 做某事对于某人来说……，it是形式主语，指代后面的动词不定式。所以答案是A。