Few Americans remain in one position or one place for a lifetime. They move from town to city to suburb, from high school to college in a different state, from a job in one region to a better job elsewhere, from the home where they raise their children to the home where they plan to live in retirement (退休). With each move they are forever making new friends, who become part of their new life at that time.
For many of them summer is a special time for forming new friendships. Today millions of Americans vacation abroad, and they go not only to see new sights but also with the hope of meeting new people. No one really expects a vacation trip to produce a close friend, but the beginning of a friendship is possible.
The word “friend ” can be applied to a wide range of relationships ---- to someone one has known for a few weeks in a new place, to a fellow worker, to a childhood playmate, to a man or woman, to a trusted confidant (知己).
小题1:. Many Americans move from place to place for the following reasons except .
A．going to college
B．getting a better job
C．finding a place to live in retirement
D．saving money小题2:. Summer is a special time when many Americans .
A．enjoy the sunlight
B．feel strange
C．travel to other countries
D．get a new job小题3: When summer comes, many Americans .
A．hope to meet new people
B．expect to find some close friends
C．want to begin lasting friendships with new people
D．Both A and B小题4: From the passage it can be seen that a “friend” can be .
A．a fellow worker
B．a football teammate
C．a boy or a girl
D．all of the above小题5:. Which of the following is the topic sentence of Paragraph 2?
A．For many of us summer is a special time for forming new friendships.
B．Today millions of Americans vacation abroad.
C．No one really expects a vacation trip to produce a close friendship.
D．But surely the beginning of friendship is possible.
，输出电压不变，故输出功率增大，输入功率变大，D正确。