2013年托福考试语法精选精讲8

1.Before the Europeans arrived, American Indians were using virgin copper___into ornament, knives, and other artifacts.

A.  Which was hammering
B. which hammered
C. was hammered
D. hammered

答案：D

2.In western North America, ____form the Great Divide, which separates the areas from which waters flow either eastward to the Atlantic or westward to the Pacific.

A. the rocky Mountains
B. where the Rocky Mountains
C. the Rocky Mountains in which
D. there are the Rocky Mountains

答案：A

3.Over the centuries, ____that try to explain the origins of the university.

A. although many theories
B.many theories
C. have many theories been
D. there have been many theories

答案：D