Despite other scientists' __________ of interest, Fleming kept trying to develop the chemical __________ it would be safe and effective.
How long do you think the car factory launches a new model?
—Haven’t you solved the problem yet?—Sorry, but I promise it in an hour.
________ the heavy snow came, the weather got colder and colder.
Jackson as well as his classmates going to learn Shakespeare’s works next week, of which some hard to understand.
In our opinion, teaching a foreign language is science.