In 1800 the northwest Acoast of North America Bis one Cof the world’s least expl

游客2024-01-02  22

问题 In 1800 the northwest Acoast of North America Bis one Cof the world’s least explored Dareas.

选项 A、 
B、 
C、 
D、 

答案 B

解析 Is is present tense where a past tense verb is needed . with the time marker 1800. Correction: was.
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