finished
interested
cleared
polluted
第1题：
capable to
able to
capable of
able of
第2题：
far
deep
farther
further
第3题：
Different aspects（方面）of an urban environment, such as the crowded streets, can lead to an increase in self control.
Small changes in urban design cannot reduce the negative side effects of city life.
For the first time in history, the earth's population is more urban than rural.
A walk down a busy city street will improve brain performance.
第4题：
entertaining
awarding
giving
proving
第5题：
must be made of
should be made of
will be made of
would be made of
第6题：
第7题：
how to write a medical research paper
how to avoid sleep loss
how the research was conducted
how to conduct a medical experiment
第8题：
will learn
will have learned
learned
had learned
第9题：
第10题：
were limited
limits
was limited
limited