21. What does the author say in the first paragraph about physical contact?

15、Nature has()these animals a capacity for not showing
fear。prepare for、be bound to、stand up for、in favor of、speculate about、in the company of、in the form of、be liable to、invest ... with、in succession

14、Indeed, if teachers want to()how far students might get in life a better measurement than grades might be how hard the students try。prepare for、be bound to、stand up for、in favor of、speculate about、in the company of、in the form of、be liable to、invest ... with、in succession

13、Because of easy access to the Internet, the new breakthrough to create something truly creative()happen anytime now。prepare for、be bound to、stand up for、in favor of、speculate about、in the company of、in the form of、be liable to、invest ... with、in succession

12、Some reform advocates ignore the impact of class size on student achievement, and they are()what they call as apriority: teacher effectiveness。prepare for、be bound to、stand up for、in favor of、speculate about、in the company of、in the form of、be liable to、invest ... with、in succession

11、Because women often restrict their diet in an effort to control weight, they may not consume enough iron-rich food and()experience an iron deficiency。prepare for、be bound to、stand up for、in favor of、speculate about、in the company of、in the form of、be liable to、invest ... with、in succession

10、A few years later, Franklin got married started his own printing shop, and was()a successful young businessman。be serious about、make sense、run into、distinguish between、thrust upon、be attracted to、get lost、feel obliged to、look upon as、be allergic to

9、It doesn't()to buy that expensive coat when these cheaper ones are just as good。be serious about、make sense、run into、distinguish between、thrust upon、be attracted to、get lost、feel obliged to、look upon as、be allergic to

8、It is hoped that some new high-tech companies will()this small, old town to encourage loans for building houses and factories。be serious about、make sense、run into、distinguish between、thrust upon、be attracted to、get lost、feel obliged to、look upon as、be allergic to

7、It's understandable that, without any support, a 16-year-old can easily()in a committee of people in their forties。be serious about、make sense、run into、distinguish between、thrust upon、be attracted to、get lost、feel obliged to、look upon as、be allergic to

6、The doctor, having no knowledge that I this particular drug, prescribed the medicine。be serious about、make sense、run into、distinguish between、thrust upon、be attracted to、get lost、feel obliged to、look upon as、be allergic to