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SAT语法 Piloted flights to Mars have not been planned (because

来源:学生作业帮 编辑:作业帮 分类:综合作业 时间:2024/05/29 13:03:08
SAT语法
Piloted flights to Mars have not been planned (because it requires) costly and complicated technology.
正确答案是because they would require
这里为什么不用will
道理是:
- - - - because they would require costly and complicated technology if the plans were made
这是虚拟语气句子,省略了 if the plans were made .