B
形式宾语
如果选C
应改为
it was
又如：
I think it necessary for you to learn English.(形式宾语）
I think that it is necessary for you to learn English.（形式主语）
that不能充当形式主语或宾语的.___has she lived in the USA? A.How far B.When C.How long D.How soon _____fun weather! A.a B.an C.the D./D. How long她在美国生活多长时间了？现在完成时。用how long多长时间……DFun weather! 多有趣的天气！天气不可数。