2. 外语
  3. They haven’t decided _____ the microscope themselves or buy one from the United States.

They haven’t decided _____ the microscope themselves or buy one from the United States.

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问题 They haven’t decided _____ the microscope themselves or buy one from the United States.
选项 A、if to build
B、whether to build
C、either to build
D、neither to build
答案B
解析
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四川省大学英语三级

大学英语三级

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