问题

________is well known to everyone，I should say，is that a man becomes learned by asking questions

A:Who
B:It
C:As
D:What

正确答案是：

同类题型

Just immediately by hisappearance.

I often hear Daniel ________English at home.Yesterday, I saw him ________with Tom on the playground on my way home.

Scientists are convinced_____the positive effect of laughter_____physical and mental health

s Day is around the corner, and I’m considering buying a gift for Mum, ________ thatis to her taste.

We have music ____ Thursday afternoons.