28．You___________use your cell phone here in our hospital because of the disturbance to the electronic equipments! It’s forbidden．
| A．shouldn’t | B．may not | C．needn’t | D．mustn’t |
It is said in the book that Thomas Edison (1847—1931) ________ the world-leading inventor for sixty years.
| A．would be | B．has been | C．had been | D．was |
Because the shop ________ , all the T-shirts are sold at half price.
| A．has closed down | B．closed down | C．is closing down | D．had closed down |
The discussion ________ alive when an interesting topic was brought in.
| A．was coming | B．had come | C．has come | D．came |
The teacher, with 6 girls and 8 boys of her class, ________ visiting a museum when the earthquake struck.
| A．was | B．were | C．had been | D．would be |
Now that she is out of a job, Lucy ________ going back to school, but she hasn’t decided yet.
| A．had considered | B．has been considering |
| C．considered | D．is going to consider |