When products made in factories _____, they are thrown away as garbage.
| A．come to an end | B．are put to use |
| C．are used up | D．wear out |
He spoke so slowly that we all could ___ him.
| A．catches | B．follow | C．understood | D．hearing |
I ___in North China, but now I ___ the weather in South China.
| A．used to live, am used to | B．used to living ; used to | C．was used to living; am used to | D．used to live; uesd to |
I have no idea __ the Greens has moved to Hangzhou or not.
| A．when | B．that | C．which | D．whether |
---Is he here now?---No, I ___ he ___ here by now.
| A．thought, was | B．think, will be | C．think, is | D．thought, had been |
My brother tried ___, but still he couldn't work out this maths problem.
| A．a great deal of | B．a great deal | C．a number of | D．lots of |