托福考试

【单选题】（） carries the genes, which determine the hereditary characteristics of the cell or organism. 
A. The chromosome 
B. The chromosome that 
C. Whereas the chromosome 
D. There is a chromosome 

【单选题】 Chaparral consists of （） stunted by short, wet winters followed by long, dry summers. 
A. are trees and shrubs 
B. how trees and shrubs 
C. trees and shrubs have 
D. trees and shrubs 

【分析解答题】 (Although) thE BEAvEr is A (powErFul) swimmEr, it hAs DiFFiCulty (movEs) thE logs AnD BrAChEs it (nEEDs For) BuilDing AnD For FooD.

【单选题】 Statistics indicate that approximate every 22 years--within a range of 3 to 4 years--a major drought occursin the United States.

【单选题】 The camera obscura, a lensless precursor of the photographic camera, (consists of) a (darkened) chamber, with light (pass) into it (through) a single tiny hole.
A．consists of
B．darkened
C．pass
D．through

【单选题】 Over the centuries, __________ that try to explain the origins of the university.
A．( although many theories
B．( many theories
C．( have many theories been
D．( there have been many theories

【单选题】 On September 6, 1996, civil rights (activist) Rosa Parks (was awarded) the Presidential Medal of Freedom, the (highest )honor the United States government gives (to civilian).
A．activist
B．was awarded
C．highest
D．to civilian

【单选题】 Manipulation of the spinal column, massage, and dietary adjustments ______ used in chiropractic therapy.
A．(the principal methods are
B．(are the principal methods
C．(how are the principal methods
D．(are there the principal methods

【单选题】 One of the basic principles of wildlife conservation involves ______ adequate natural food and shelter to maintain populations of each species in a given habitat.
A．(the provision
B．(that provision
C．(to provide
D．(providing

【单选题】 Documentary evidence supports claims that ______ the New World about AD 1000.
A．(reached the Vikings
B．(the Vikings reached
C．(reaching the Vikings
D．(the Vikings that reached