---Turn off the TV, Jack, ______ your homework now?
--- Mum, just ten more minutes, please.
| A．should you be doing | B．shouldn’t you be doing |
| C．couldn’t you be doing | D．will you be doing |
These mistakes are very___________ among students, so we’re not surprised if you also make such mistakes.
| A．grand | B．common | C．considerate | D．popular |
If anyone happens to drop in while I am out, _________ him or her leave a message.
| A．have | B．get | C．ask | D．tell |
Though I’ve tried very hard to improve my English, by no means ___________with my progress.
| A．the teacher is not satisfied | B．is the teacher not satisfied |
| C．the teacher is satisfied | D．is the teacher satisfied |
Science and technology have in important ways contributed to the improvement of agricultural production.
| A．contributed to | B．resulted from | C．carried off | D．handed over |
He is very sick. I insist that a doctor __________ immediately.
| A．has been sent for | B．sends for | C．will be sent for | D．be sent for |