The phrase “hard lessons” refers to_____          ...

Câu hỏi: The phrase “hard lessons” refers to_____           .

A things that are hard to understand

B ways they learned to break up hard ice

C things they learned because bad things happened

D things that are difficult to do

Câu hỏi trên thuộc đề trắc nghiệm

Reading 6B: Polar Pioneer