Afieldtripisajourneybyagroupofpeopletoaplaceawayfrom  6...

问题详情：

A field trip is a journey by a group of people to a place away from   61  （they）normal environment.

The purpose of the trip is usually observation for   62  (educate), non-experimental research or to provide students with experiences outside their everyday    63  (activity), such as going   64  (camp) with their teachers and classmates. The aim of this research is to observe the subject in its natural state and   65  (possible) collect samples(标本). In western culture people first come across this method during school years    66   classes are taken on school trips to visit a geographical feature of the landscape. Much of the early research into the natural sciences   67  (be) of this form. Charles Darwin is considered to be   68  important example of someone who has contributed   69    science through the use of field trips.

  70  (reduce) risks and expenses, most school systems now have set up field trip procedures that consider the entire trip from estimation, approval to scheduling.

【回答】

61. their    ation   vities   ing   ibly          

reduce

知识点：语法填空

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