托福考试

【单选题】AltituDE, ClimAtE, tEmpErAturE, AnD thE lEngth oF thE growing sEAson Both DEtErminE whErE plAnts will grow.

【单选题】 There are about 350 species and subspecies of birds in danger of become extinct, with a large number of them, 117 in all, found on oceanic islands.

【单选题】 According to tile passage, scientists used isotopes from the water of the ice core to determine which of following
A．( The amount of air that had bubbled to the surface since the ice had formed
B．( The temperature of the atmosphere when the ice was formed
C．( The date at which water had become locked in the glacier
D．( The rate at which water had been frozen in the glacier

【单选题】 Green plants combine __________ with water and carbon dioxide to make food.
A．( energy derived from light
B．( energy, derived it from light
C．( energy is derived from light
D．( from light, and energy derived

【单选题】 The word "finding" in line 20 is closest in meaning to
A．( published information
B．( research method
C．( ongoing experiment
D．( scientific discovery

【单选题】 The ice of a glacier that reaches the sea breaks off—.
A．( and forming icebergs
B．( to form icebergs
C．( icebergs have-formed
D．( when the formation of icebergs

【单选题】 One of the (most impressive) cultural achievements of the United State (during) the 1920's was a (vastly) outpouring of (serious literature).
A．most impressive
B．during
C．vastly
D．serious literature