考试新辅导之托福写作题库新增试题八2
。The Chisos Mountains in Big Bend National Park in Texas were created by volcanic eruptions that occurred _____。（A）the area in which dinosaurs roamed
（B）when dinosaurs roamed the area
（C）did dinosaurs roam the area
（D）dinosaurs roaming the area。
9。In bas－relief sculpture，a design projects very slightly from its background，_____ some coins。
（A）as on
（B）because
（C）the way that
（D）similarly。
10。Alaska found the first years of its statehood costly because it had to take over the expense of services _____ previously by the federal government。
（A）To provide
（B）Be provided
（C）providing
（D）provided。
11。With age，the mineral content of human bones decreases，_____ them more fragile。
（A）make
（B）and to make
（C）thereby making
（D）which it makes。
12。Not until Kentucky‘s Mammoth Cave had been completely explored in 1972_____。
（A）when was its full extent realized（B）that its full extent realized
（C）was its full extent realized
（D）the realization of its full extent。
13。The first explorer _____ California by land was Jedediah Strong Smith，a trapper who crossed the southwestern deserts of the United States in 1826。
（A）that he reached（B）reached
（C）to reach
（D）reaching it
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