托福考试

【单选题】As seen from the Earth at night, （） planet Jupiter ranks third among the planets and stars in maximum brightness, after Venus and Mars. 
A. when the 
B. in which the 
C. the 
D. and the 

【单选题】Everyone in a particular society recognizes social roles: father, mother, child, teacher, student, police officer, store clerk, doctor, judge, political leader, and so on. Every culture expects certain types of behavior from people who play certain social roles. Anyone occupying a given position is expected to adopt a specific attitude. A store clerk is expected to take care of customers patiently and politely, and a judge is expected to make wise and fair decisions about laws. 
Informal social roles are not always easy to recognize, but can be identified with careful research. They are key indicators of a group‘s health and happiness. Within the family, one informal role is the family hero, the person who defines integrity and upholds family morality. Others are the family arbitrator, the person who keeps the peace, and the family historian, often a grandparent, who relays valuable cultural information that maintains both the family and the larger society. And finally, there is the family friend, the person who provides comfort and companionship to the family members with emotional needs. 
1.Why does the author mention a store clerk and a judge in paragraph 1? 
A. To give examples of people who hold positions of respects. 
B. To explain why social roles are important to a society. 
C. To illustrate the behavior required of certain social roles. 
D. To compare the responsibilities of two different occupations. 
2.Why does the author use the term key indicators in discussing informal social roles? 
A.To identify the most important type of social roles. 
B.To explain how to identify informal social roles 
C.To point out that informal roles are unique to families 
D.To emphasize the value of informal roles to a group 

【单选题】 BusEs wErE DEvElopED At thE BEginning oF thE twEntiEth CEntury to CompEtE with strEEtCArs By proviDing FlExiBility grEAtEr in routEs.

【单选题】oF All thE ElEmEnts in thE EArth's Crust, oxygEn is known to BE thE morECommon.

【单选题】 With more than half the world's annual yield of 50 million tons of soy beans, an important source of protein, is grown in the United States.