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單項選擇題

The act of speaking will also help to improve listening comprehension（）

A.to some way
B.in the way
C.to some extent
D.in the extent

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They walked（）the woods.

A.up
B.down
C.through
D.over

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It was well known that Thomas Edison（）the electric lamp.

A.invented
B.discovered
C.found
D.developed

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