Nowadays people are convinced ___ the negative effect of second-hand smoking ___ people around.
| A．of; at | B．by; in |
| C．of; on | D．on; at |
The teacher，with 6 girls and 8 boys of her class, __________ visiting a museum when the earthquakes truck.
| A．was | B．were | C．had been | D．would be |
Professor Smith，along with his assistants，___________ on the project day and night to meet the deadline.
| A．work | B．working | C．is working | D．are working |
_______you’ve got a chance, you might as well make full use of it.
| A．Now that | B．After | C．Although | D．As soon as |
The way ______he looks at problems is wrong.
| A．which | B．whose | C．what | D．/ |
In our factory there are 2,000 workers, two thirds of ____are women.
| A．them | B．which | C．whom | D．who |