If you don’t stop swimming in that lake, you will have a rash

If you don’t stop swimming in that lake, you will have a rash
A. Unless you don’t stop swimming in that lake, you will have a rash.
B. Unless you stop swimming in that lake, you will have a rash.
C. If you don’t keep swimming in that lake, you will have a rash.
D. Unless you keep stop swimming in that lake, you will have a rash.

Đáp án: B
Giải thích: Unless = if…not…: nếu không, trừ phi
Stop Ving: ngừng làm gì >< keep Ving: cứ tiếp tục làm gì
Dịch: Nếu bạn không ngừng bơi ở cái hồ đó, bạn sẽ bị nổi mẩn ngứa đó