单项选择题

Just as a force is required to change the speed of an object,（）a force must act to cause a change in the direction of the motion.

A. as
B. thus
C. so
D. like

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单项选择题
His answer was so confused that I could hardly make any（）of it at all.

A. explanation
B. meaning
C. sense
D. interpretation
单项选择题
（）from a distance, the island looked like a cloud.

A. Viewing
B. To view
C. Viewed
D. Being viewed
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