托福考试

【单选题】（） industries, inventions, and communal endeavors of the Shakers, the best known is their fine furniture. 
A. Of the many 
B. Their many 
C. Are the many 
D. Many of the 

【单选题】 The word "heightened" in line 18 is closest in meaning to
A．( complicated
B．( directed
C．( observed
D．( increased

【单选题】 The economic (heart) of Canada, Ontario (accounts for) more than 40 (percentage) of the nation'sproductive (capacity).
A．heart
B．accounts for
C．percentage
D．capacity

【单选题】 ( When canned using )proper methods, food suffers (no) loss ill vitamins or (another) nutritive elements.
A．When canned
B．using
C．no
D．another

【单选题】 The author mentions twenty percent itl line 23 to indicate that
A．( eagles are twenty percent bigger than most birds
B．( twenty percent of all nests include foundation branches
C．( the nests of eagles are twenty percent of larger than those of other birds
D．( birds Can carry twenty percent of their own weight