On ________ Friday when Tom was having an art lesson，as he had no color pencils with him，he drew ________ blue sun with his pen.
| A．/；the | B．/；a | C．the；the | D．a；a |
When they met again in New York, ten years __________.
| A．passed |
| B．was passing |
| C．had passed |
| D．has passed |
__________ the time the firemen arrived, the building had been burnt to pieces.
| A．At |
| B．Till |
| C．When |
| D．By |
__________ industry develops quickly, more and more rivers are being polluted.
| A．When |
| B．As |
| C．After |
| D．With |
Most Chinese musical instruments are quite different __________ western ones __________ shape.
| A．with ； from |
| B．with ； in |
| C．from ； with |
| D．from ； in |
His parents are both out of work, so they can't __________ a computer.
| A．afford |
| B．be afforded |
| C．be offered |
| D．afford buying |