At last our head teacher ______ who broke the window of the classroom.

My mother was cooking while I_________ the radio.

Peter            basketball.

Sanya is a beautiful city. I          there twice.

--Where is your cousin?
--He          an English exam now.

Last night, I          computer games when my mother came into my bedroom. You can't imagine how embarrassed I was then!                       
A. played                   B. was playing              C. have played

－Hello, mum. Are you still on Lushan Mountain?
－Oh, no. We are back home. We _________ a really good journey.

－Hello, Mary! This is John. You must know why I _________ you.
－Oh, hello, John! I've waited for this call since last month.

I know a little about Thailand, as I ________ there three years ago.

—Where is your father?
—He _________ Beijing on business. He will be back soon.
A. has gone to       B. has been to      C. has been in