______ you understand this rule, you’ll have no further difficulty.
| A．while | B．Once | C．Though | D．Unless |
Many rules in English are ______, and large numbers of students feel ______ them.
| A．confused; puzzled with | B．confusing; puzzled about |
| C．confused; puzzling with | D．confusing; puzzling about |
The reason ______ Old French made contributions to Middle English is ______ English borrowed many words from it.
| A．why; because | B．that; because | C．why; that | D．that; that |
Wastes from the factory ______the water pollution in this area.
| A．resulted from | B．paid off | C．paid back | D．resulted in |
---Oh, you’ve got this English-Chinese dictionary. How do you find it?
----It is ______. I turn to it whenever I meet with new words.
| A．of no use | B．great useful | C．of great use | D．not useful |
Chinese differs from western languages ______ it uses characters ______ stand for ideas, objects and deeds.
| A．in that; which | B．because of; that | C．in what; which | D．because; / |