题目内容


Many people say they love birds, but some plant trees _________ some make cages.
A．untilB．thoughC．unlessD．while
D
考查连词：A. until直到，B. though虽然，C. unless除非，D. while然而，句意是：很多人说喜欢鸟，但一些人种树，一些人做鸟笼。选D。
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