关于主语从句的几道题.What she is ill made us very worried.taht 引导主语从句可

关于主语从句的几道题.
What she is ill made us very worried.
taht 引导主语从句可以放在居首啊?不是要用it作形式主语吗
____he said nothing at the meeting surpried us.
A that B what C all that D all what (A)
____black cats are bad luck is considered a superstition(迷信）rather than a fact.
A that B the C although D it is said that(A)
_____is more or less advanced can pass this test.
A anyone Bwho C whoever D a student ( C)
就这几分了,少了点,明天登录了在追加,