Nuclear science should be developed to benefit the people _____ harm them.
—Do you think you could successfully light the flame at the opening ceremony? —_______. This is not the first time for me.
The father and the son entered the tiger area _______ two doors were open at the time. Suddenly five tigers appeared, one of which killed the father.
Gilbert wasn’t ______ the time this morning, so he was late for school.
Weshouldconsidertheprofessor’s advice _______ our school library provide more books on popular science.
If Newton lived today, he would be surprised by what _______ in science and technology.