Which of these is an optical illusion?

Câu hỏi: Which of these is an optical illusion?

A hearing a voice in your head that isn’t there

B seeing water on a road when it’s not really there

C looking up at a strange cloud and noticing its shape

D seeing a snake and noticing it moving

Câu hỏi trên thuộc đề trắc nghiệm

Reading 7B: Seeing the Impossible