Question

【题目】— I find it difficult to learn Physics well.

— That’s true. Nobody can learn it well _______ he works hard at it.

A. if B. because C. unless

Answer 1

【答案】C

【解析】

试题分析：句意：---我发现很难学好物理。——这是真的。没有人能学好它，除非他刻苦学习。A. if如果，是否；B. because因为；C. unless除非，如果不。结合句意可知选C。