题干
—So hard _____ in the past few months that he has made great progress in English.
—I can see that; only a few mistakes _____ in the exam.
—I can see that; only a few mistakes _____ in the exam.
| A．has he worked; did he make | B．he has worked; did he make |
| C．he has worked; he made | D．has he worked; he made |
答案(点此获取答案解析）
