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 made |
| C．he has worked; he made |
| D．has he worked; he made |
答案(点此获取答案解析）
