This is a very interesting book．I’ll buy it，           ．

I had just stepped out of the bathroom ______ I heard the steps.

The photo was taken ______ stood the famous Bird’s Nest in Beijing during the Olympics.

You should report any incident, _____ serious or minor it is.

— That boy enjoys drawing very much.

—____, I have never seen anyone else who is as enthusiastic about drawing as he is.

     , a form must be filled in.

 —Sir， can I pass the examinations this time？

—That depends on　　　　you work hard enough or not.

what  B. that  C. whether  D. how

Today impressionist paintings are accepted as the beginning of ______ we call “modern art”.

—Mary, don’t you believe your sister?

—Yes. I believe _____ she says.

A tunnel was built under _____ was a lake a year ago.