The number of people in the world__________ about 6 billion and large quantities of waste ____ each year.
| A．total; has been produced | B．totals; is produced |
| C．totals; are produced | D．total; are being produced |
— Have a coffee, Tom?
— No, thanks. _____. I enjoy drinking tea.
| A．I’m very busy. | B．I don’t like it. |
| C．Never mind. | D．I’d rather not. |
—Hello, this is Tom speaking.
—Tom? Oh, sorry, I ______ your voice.
| A．didn’t realize | B．don’t realize | C．don’t recognize | D．didn’t recognize |
___________ get a better score, she has been studying hard all day.
| A．So as to | B．In order to | C．So that | D．In order that |
It is the first time that I ______________ such a beautiful scene.
| A．saw | B．see | C．had seen | D．have seen |
Do you know that I have trouble __________ the work?
| A．to do | B．doing | C．do | D．done |