Nowadays teachers tend to be more dependent on ________ is thought to be a great teaching aid—the computer.
| A．that | B．which | C．what | D．As |
We know such people are not ___.
| A．to rely on | B．to be relied upon | C．to be relied | D．to rely upon |
The article gave a ____ description of South America.
| A．live | B．alive | C．lively | D．living |
In my opinion, life in the twenty-first century is much easier than ____.
| A．what used to be | B．that it used to be |
| C．it used to be | D．what it used to be |
____ and we’ll get everything ready for the taking off.
| A．Have one more hour | B．If I have one hour more |
| C．Given one more hour | D．One more hour |
____ apple fell from the tree and hit him on ___ head.
| A．An; his | B．The; the | C．An; the | D．The; / |