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 |
--Will you two go to the show tomorrow?
---No. We're going to a lecture, or at least I'm planning ____.
| A．it | B．to | C．that | D．so |
I'd love ___ to your party last Sunday if not because of the unexpected guests.
| A．to go | B．going | C．having gone | D．to have gone |
____ the temperature falling so rapidly, we couldn't go on with the experience.
| A．Since | B．With | C．As | D．For |
--- Do you know Uncle Tom is crazy about gardening?
---Sure. He ____ his flowers in the garden now.
| A．may be watering | B．must be watering |
| C．could look after | D．ought to watch |
He is neither______ European, nor______ American. He is from______ Australia.
| A．a; a; / | B．a; an; the | C．a; an; / | D．an; an; / |