Even if you had not been able to see her, you ______ us.
| A．told | B．had told | C．should tell | D．should have told |
Students should be encouraged to use _____ Internet as _________ resource.
| A．不填; a | B．不填; the | C．the; the | D．the; a |
The biggest whale is ___ blue whale, which grows to be about 29 meters long—the height of ____ 9-story building.
| A．the; the | B．a; a | C．a; the | D．the; a |
We can never expect bluer sky unless we create less polluted world.
| A．a; a | B．a; the |
| C．the; a | D．the; the |
I was born in New Orleans, Louisiana, a cityname will create a picture of beautiful trees and green grass in our mind.
| A． | which | B． | of which | C． | that | D． | whose |
At the age of 29, Dave was a worker, _____ in a small apartment near Boston and ______ what to do about his future.
| A．living; wondering | B．lived; wondering |
| C．lived; wondered | D．living; wondered |