What`s in your box—There is ___ in it. It`s empty.

Linda, is there anything else you want to know about China—Yes, I am still wondering _____________.

I want to buy a bike. At last I decided ____ a black one.

The head of the company promised to deal with matters of this sort _____he returned to his office

It was ______ of Jack to turn off the radio when I was sleeping in the bedroom. — So he was. [ ]