12．We have to study for a bright future, so we have to lose some sleep_________we're worn out.
| A．in case | B．as though | C．as long as | D．even though |
A man does not know the difficulty of anything _______ he does it personally.
| A．although | B．if | C．because | D．unless |
The notes for glossary (词汇) are very exact and particular, which could help readers to break the language so directly and effectively.
| A．defence | B．function | C．response | D．barrier |
There is no power like _____ power of confidence, and there is no student as competitive as _____ student who trusts his own abilities.
| A．the; a | B．a; the | C．/; a | D．the; / |
When it comes to a foreign language, he is not ________ quick a learner as his brother.
| A．very | B．too | C．so | D．rather |
________ advertisements are of great help, I don’t think we should entirely rely on them.
| A．Because | B．Since | C．Once | D．While |