While he was investigating ways to improve the telescope Newton made _______discovery which completely changed ____ man’s understanding of color.
| A．a ,/ | B．a ,the | C．/, the | D．the ,a |
The army went ________the thick forest and at last came to a little river.
| A．across | B．over | C．above | D．through |
You have made several mistakes in your exercises but ________you have done well.
| A．on the whole | B．except that |
| C．generally speaking | D．on the other hand |
The water lever has risen ________10 cm and up to 100cm in the last days.
| A．to | B．of | C．in | D．by |
The touch they had both kept in ________many years broke.
| A．for | B．on | C．with | D．into |
Don’t call me up in the company tomorrow,for I am________.
| A．in holiday | B．on holiday | C．for a holiday | D．during holiday |