托福考试

【单选题】Because of （） diversity, seven separate groupings or divisions of algae have been established by botanists. 
A. them 
B. so that 
C. those 
D. their 

【单选题】 The pelican is a water bird with a (large) pouch attached to (its) bill, which it uses (as) a scoop (for) catch small fish.
A．large
B．its
C．as
D．for

【单选题】By 1872 thE unitED stAtEs hAD 70 EnginEEring CollEgEs, ______Astonishing ExpAnsion CrEDitED lArgEly to thE morrillACt oF 1862.
A、BECAusE
B、An
C、to whiCh
D、wAs

【单选题】 Many scientists believe ________ as a result of a collision between the newly formed Earth and a large asteroid.
A．that the Moon was formed
B．in that the Moon was formed
C．that the Moon formed was
D．when the Moon war formed

【单选题】 (Cameras) of one type or (another) have been (using) for more than (A) hundred years.
A．Cameras
B．another
C．using
D．A