4、 The world is like a mirror: _at it and it_at you .
5、 Video from security camera footage overlooking the driveway where the victim was shot appeared to contradict(与……相矛盾) _McManus' statement .
6、A basic understanding of mathematics is needed to explain a wide variety of natural_.
7、They are doing a research project to_the harmful effects of air pollution in the city .
8、As for Laura and me,the colour of our skin has never_. either in the workplace or on social occasions .
9、A large crowd of reporters gathered outside the building to_the decision of the court .
10、She is not considered an outstanding student .But _she has surprised her parents with her excellent performance .
11、The World Trade Organization was established to_trade among its member states .
12、We are here to discuss how to proceed with our investigation . What you are saying is not_.
13、For the experiment to be_ , it is essential to record all data accurately .
14、Hard work can often_a lack of intelligence .
15 To reduce our_on foreign technology, we must invest more in research and development.