Question

主语从句的题，求大神给个比较详细的解析！

15. _____ is a pity that he should feel so upset. D
A. What B. That C. He D. It
16. _____ a spoonful of soil can tell us so much about the structure and early
history of the moon.
A. Remarkable B. Quite remarkably C
C. It is remarkable that D. It is remarkable

麻烦给个详细的点的解析，比如第一题为什么选D，为什么不选别的。谢谢了~

Answer 1

15. D 16. C
这两题类型是一样的。 It is........ that........
that引导的是主语从句（真正意义上的主语）， 而It只是形式主语