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题库 / Prep2007E1-SC-95
Unlike frogs that metamorphose from tadpoles into adults within a one-year period, it takes three to four years for the mountain yellow-legged frog of the Sierra Nevada to reach adulthood, and so they are restricted to deeper bodies of water that do not dry up in summer or freeze solid in winter.
it takes three to four years for the mountain yellow-legged frog of the Sierra Nevada to reach adulthood, and so they are
it takes the mountain yellow-legged frog of the Sierra Nevada three to four years until it reaches adulthood, and therefore it is
in the Sierra Nevada, mountain yellow-legged tree frogs take three to four years to reach adulthood, thus being
mountain yellow-legged frogs of the Sierra Nevada take three to four years until they reach adulthood, thus
mountain yellow-legged frogs of the Sierra Nevada take three to four years to reach adulthood, and so they are
* unidiomatic use of "until".
you can't say "you'll take X amount of time UNTIL..."
UNTIL is used after a description of an action: i will run until i become exhausted.
the correct idiomatic expression is "you'll take X amount of time to VERB," as used in the correct choice.
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