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單項(xiàng)選擇題

More than 30 years ago, （）that the region was rich in natural resources。

A.people did little know
B.people little know
C.little did know
D.little did people know

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單項(xiàng)選擇題

She walked into the room carefully because she （） waking her husband up。

A.was keen on
B.was afraid of
C.was eager to
D.was careful with