That price of music sounds quite familiar．Who ________ the piano upstairs?

A．has played

B．played

C．plays

D．is playing

A computer can only do ________ you have instructed it to do．

A．how

B．after

C．what

D．when

By the time Jack returned home from England, his son．_________ from college．

A．graduated

B．has graduated

C．had been

D．had graduated

_________ a strange plant! I've never seen it before．

A．Which

B．What

C．How

D．Whether

When the news came _________ the war broke out, he decided, to serve in the army．

A．since

B．which

C．that

D．because

Bring the flowers into a warm room _________ they'll soon open．

A．or

B．and

C．but

D．for

_________ around the fire, the tourists danced with the local people．

A．Gather

B．To gather

C．Gathering

D．To be gathering

He had no sooner finished his speech _________ the students started cheering．

A．since

B．as

C．when

D．than

I'll go to the library as soon as I finish what I ________

A．was doing

B．am doing

C．have done

D．had been doing

The exam results will be _________ on Friday afternoon．

A．put down

B．put off

C．put up

D．put away