EXERCISE 2. HÃY CHO BIẾT TỪ ĐỒNG NGHĨA HOẶC GẦN NGHĨA, TỪ TRÁI NGHĨA C...

34. We found the exam extremely easy. We so hard.A. needn’t study B. needn’t be studyingC. needn’t have studied D. needn’t have been studied