The flood may rise higher. We have to move upstair...

Câu hỏi: The flood may rise higher. We have to move upstairs.

A. We have to move upstairs soon if the flood rises any higher.

B. Unless the flood rises any higher we won’t have to move upstairs.

C. If we don’t move upstairs, the flood may rise higher.

D. We have to move upstairs in case the flood rises any higher.