做非谓语单选题时为什么有逗号和连词前面就不是填非谓语? 而没连词时选非谓语动词
如:———thewebsiteoftheFireDepartmentinyourcity,andyouwilllearnalotaboutfirefighting.选择的...
如:———the website of the Fire Department in your city, and you will learn a lot about firefighting.选择的是 D. Search
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