Most birds find it safe to sleep in the trees, but they have eggs or young chicks, they don’t use a nest. [2007 湖南卷] A. why B. how C. unless D. where 查看更多

 

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Most birds find it safe to sleep in the trees, but ________they have eggs or young chicks, they don’t use a nest.

A.why   B.how   C.unless   D.where

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Most birds find it safe to sleep in the trees, but ____ they have eggs or young chicks, they don’t use a nest.

   A. why       B. how      C. unless      D. where

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Most birds find it safe to sleep in the trees,but_______they have eggs or young chicks,they don’t use a nest.

A.why                                                             B.how

C.unless                                                          D.where

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Most birds find it safe to sleep in the trees, but __________ they have eggs or young chicks, they don’t use a nest.

A. why   B. how   C. unless    D. where

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.Most birds find it safe to sleep in the trees, but __________ they have eggs or young chicks, they don’t use a nest.

A. why    B. how

C. unless D. where

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