The car the truck so closely, otherwise the traffic accident could have been avoided.
| A．shouldn’t follow | B．was following | C．has been following | D．mustn’t follow |
I need one more stamp before my collection________.
| A．has completed |
| B．completes |
| C．has been completed |
| D．is completed |
—Do you like the material?
—Yes, it________very soft.
| A．is feeling |
| B．felt |
| C．feels |
| D．is felt |
Jackson________to work in government office though he hated serving there.
| A．wanted |
| B．was wanted |
| C．was wanting |
| D．had wanted |
Albert Einstein will always be remembered________a great physicist________his Theory of Relativity.
| A．for; for |
| B．as; of |
| C．as; for |
| D．as; with |
—The window is dirty.
—I know. It________for weeks.
| A．hasn't cleaned |
| B．didn't clean |
| C．wasn't cleaned |
| D．hasn't been cleaned |