.
Jenny, your paintings are wonderful. I _____ you learned to paint.
| A．hadn’t known | B．didn’t know | C．won’t know | D．haven’t known |
A1l flights _________ because of the heavy storm, so we decided to take the train.
| A．have canceled | B．have been canceled |
| C．had canceled | D．had been canceled |
Though ______in a big city, Peter always prefers to paint the beautiful scenes of country life.
| A．raised | B．was raised | C．raising | D．raises |
Please give Jim the schedule for tomorrow's conference when he _______ back. He is to chairthe conference.
| A．will come | B．came | C．comes | D．is coming |
I'm going to spend the winter vacation in Shanghai,_______I have relatives.
| A．which | B．that | C．where | D．when |
________ you ought to do now is to see a doctor at once.
| A．How | B．That | C．Which | D．What |