America will never again have as a nation the spirit of adventure as it ________ before the West was settled. A) has B) did C) was D) would
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【简答题】句型转换 1. Jane isn't good at Science, I think. (宾语从句) I ______ think Jane ______ ______ at Science. 2. The woman who is talking with our head teacher is my mother. (同义句) The woman ______ ______ our head...