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1 . What really worries us is __________the explorers can accurately locate themselves with the old device in case of bad weather.
| A．that | B．where | C．what | D．whether |
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2019-11-12更新
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166次组卷
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3卷引用：上海市延安中学2017-2018学年高二上学期期中英语试题
上海市延安中学2017-2018学年高二上学期期中英语试题（已下线）05 Unit 2 Section B Learning About Language-2020-2021学年高二英语课时同步练（人教版2019选择性必修第二册）Unit 4 The senses Unit Test A卷（上教版2020）
