HE FOUND IT EXTREMELY DIFFICULT TO LEARN THIS SUBJECT. A. IF TOM H...

49. He found it extremely difficult to learn this subject. A. If Tom had studied hard, he wouldn’t have failed the exam. A. The subject was so easy that he could learn it well.B. If Tom didn’t failed the exam, he would study hard. B. It was extremely difficult for him to learn this subject.C. If Tom hadn’t failed the exam, he would have studied hard. C. He had difficulty finding the subject.D. If Tom studied hard, he wouldn’t fail the exam. D. He did not find it difficult to learn this subject