She promised to be here at 8:00, but she never ______.
| A．turned down | B．turned off | C．turned over | D．turned up |
The driver started to speed up to ______ for the hour he had lost in the traffic jam.
| A．keep up | B．take up |
| C．make up | D．catch up |
______ do we owe the discovery of the wild land?
| A．What | B．Who |
| C．To whom | D．For what |
—How much should I pay for the ice cream?
—It's my ______.
| A．choice | B．treat |
| C．present | D．charge |
______ studying abroad can be hard， it can broaden your understanding of the world.
| A．If | B．While |
| C．Because | D．Since |
When I came in, I found Lucy ______ by the window ______ to music.
| A．seated; listening | B．seated; listened |
| C．seating; listened | D．seating; listening |