托福考试

【单选题】 （） the percentage of individuals with similar traits in succeeding generations, geneticists use the theory of probability. 
A. The calculation of 
B. To calculate 
C. Is calculating 
D. Calculated 

【单选题】 rEptilEs ArE FounD on lAnD AnD in wAtEr, But thEy CAnnot AlivE in FrigiD ClimAtEs BECAusE thEy nEED thE sun's wArmth to givE thEm EnErgy_

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

【单选题】 Norman Rockwell was a meticulous artist (who) paintings (portrayed) family incidents and well-defined (characters) with a wealth of supporting (details).
A．who
B．portrayed
C．characters
D．details

【单选题】 What does the passage mainly discuss
A．( The artwork of James and Sarah Miriam Peale
B．( How Philadelphia became a center for art in the nineteenth century
C．( Nineteenth-century still-life paintings in the United States
D．( How botanical art inspired the first still-life paintings