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 novel was so interesting that he read it _____ in a single day.
| A．from word to word | B．from sentence to sentence |
| C．from chapter to chapter | D．from cover to cover |
_________ the temperature might drop, coal was prepared for warming.
| A．To consider | B．Considered | C．Considering | D．To be considered |
We are told that more new teaching buildings ________ next year.
| A．build | B．was built | C．has built | D．will be built |
The captain urged that the mission ______ before dark.
| A．must be finished | B．be finished | C．ought to be finished | D．was finished |
The _____ as one travels by boat along the Changjiang Three Gorges is fantastic.
| A．scene | B．view | C．scenery | D．sight |