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單項選擇題

These plants are rather difficult（）

A.to look after
B.to be looked after
C.being looked after
D.looking after

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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

單項選擇題

They walked（）the woods.

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

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