-It's said that scientists have made __________ big breakthrough in the cancer treatment.
-If so, many people can have been brought back to __________ life ！
| A．a; / |
| B．/；a |
| C．the; the |
| D．a; the |
—Have you ever ridden a horse ?
—No, but I _____ a camel when I visited Egypt last year.
| A．was riding | B．have ridden | C．rode | D．had ridden |
It took a great deal of courage to admit that all his efforts had been ____.
| A．in vain | B．in turn | C．in return | D．in danger |
Recently our class held a fierce _____ as to whether cameras should be installed in public areas.
| A．conflict | B．debate | C．bargain | D．contest |
As we all know, surfing _____ Internet has now become _____ popular means of getting information.
| A．the; the | B．/; the | C．the; a | D．/; / |
—Your hamburger is the best I’ve ever tasted, Ms. Black!
—Thanks, Harry. _____.
| A．That’s easy to make | B．I learned it from my parents |
| C．Please don’t say so | D．I’m glad you enjoyed it |