Bộ 20 đề luyện thi Chuyên Anh năm 2023 có đáp án (Đề 92)

at the Isthmus of Panama, so animals were able to migrate between North and South America. A. With a land bridge    B. When a land bridge existed    C. A land bridge     D. A land bridge exi

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___________ at the Isthmus of Panama, so animals were able to migrate between North and South America.

With a land bridge

When a land bridge existed

A land bridge

A land bridge existed

Giải thích

Đáp án: D