How did Mary feel when she could not answer her teacher’s questions?— _____ and uncomfortable. [ ]

Helen spent ______ time studying Englishthan I did.

I wanted to know _____________.

So far we have done a lot to build a low-carbon economy, but it is ____ ideal (理想) We have to work still harder

Thehouse I grew up ________ has been taken down and replaced by an officebuilding