Question

这题的答案为什么是D?

Does ______ surprise you to know that the wonderful invention was made by a twelve-year-old schoolboy?

A. he
B. that
C. this
D. it

Answer 1

Does ______ surprise you to know that the wonderful invention was made by a twelve-year-old schoolboy?
A. he，不对，句子的主语不是他。

B. that，不对，that不能用于代替不定式做主语。
C. this，不对，this不能用于代替不定式做主语。
D. it 可以代替不定时作主语（本题的主语是to know .。。。。）

Answer 2

这句英文的语法是：
Does it surprise you？【it】指的是整个这个事情：
“to know that the wonderful invention was made by a twelve-year-old schoolboy”。

Answer 3

反问句的意思，正常说是：it surprises you。。。
加强语气，把助动词does 提前，便反问语气

Answer 4

不定式为实际主语的情况下，使用it作为形式主语，的典型语法。

Answer 5

使你吃惊的是一件事，就是that后的