So far we have done a lot to build a low-carbon economy, but it is _______ ideal. We have to work still harder.
— Could I use your computer for a few moments, please?— __________. I’m not using it myself.
–What’s that noise?–Oh, I forgot to tell you. The new machine ______.
__________ the kids have left home, we’ve got a lot of extra space.
The naughty boy _____ to me that the hen _____ there just now had ____ two eggs theday before.
___________ David showed the report to the public surprised me.A What B. That C. Which D. Who