37.【解析】variety。a variety of為習慣用語，表示各種各樣的, 種類繁多的。

　　38.【解析】tradition。從空格前的a long和空格后的介詞of可以推斷此處應填一名詞。空后的history對所填詞起一定的提示作用。

　　39.【解析】throughout。從空格后的逗號后面是一個完整的句子可以判斷所填詞應該是介詞?？蘸蟮?its history及 the country has welcomed from all over the world, most of whom have needed to learn English中兩處用的現在完成時起提示作用。

　　40.【解析】immigrants。所填詞作welcomed的賓語，并且這些人是來自世界各地，他們中的大多數都需要學英語。

　　41.【解析】experienced。從and可以判斷所填詞和qualified構成并列關系，因此所填詞應為一形容詞，概念上與qualified相近，共同修飾teachers。

　　42.【解析】overseas。所填詞修飾students，因此應該為一形容詞?？涨暗膄rom allover the world起提示作用。

　　43.【解析】enroll。所填詞作who的謂語，并且與students在數上一致，故應填一原形動詞，并且此動詞和介詞on搭配。

　　44.【答案】Most of these institutions provide preparation courses for students who need to improve their English before they start university study

　　【Main Points】Students who need to improve their English before they start university study can take preparation courses in these universities and colleges

　　45.【答案】they are the most common type of courses taken by overseas students

　　【Main Points】overseas students usually take these courses

　　46.【答案】the chance to get to know the school where they will be studying and become more familiar with the American academic environment

　　【Main Points】the chance to know their school and the American academic environment

　　37.【解析】variety。a variety of為習慣用語，表示各種各樣的, 種類繁多的。

　　38.【解析】tradition。從空格前的a long和空格后的介詞of可以推斷此處應填一名詞?？蘸蟮膆istory對所填詞起一定的提示作用。

　　39.【解析】throughout。從空格后的逗號后面是一個完整的句子可以判斷所填詞應該是介詞。空后的 its history及 the country has welcomed from all over the world, most of whom have needed to learn English中兩處用的現在完成時起提示作用。

　　40.【解析】immigrants。所填詞作welcomed的賓語，并且這些人是來自世界各地，他們中的大多數都需要學英語。

　　41.【解析】experienced。從and可以判斷所填詞和qualified構成并列關系，因此所填詞應為一形容詞，概念上與qualified相近，共同修飾teachers。

　　42.【解析】overseas。所填詞修飾students，因此應該為一形容詞。空前的from allover the world起提示作用。

　　43.【解析】enroll。所填詞作who的謂語，并且與students在數上一致，故應填一原形動詞，并且此動詞和介詞on搭配。

　　44.【答案】Most of these institutions provide preparation courses for students who need to improve their English before they start university study

　　【Main Points】Students who need to improve their English before they start university study can take preparation courses in these universities and colleges

　　45.【答案】they are the most common type of courses taken by overseas students

　　【Main Points】overseas students usually take these courses

　　46.【答案】the chance to get to know the school where they will be studying and become more familiar with the American academic environment

　　【Main Points】the chance to know their school and the American academic environment