2 . But there are still some dishes that Dad ________________ (不敢尝试) even after many years of marriage to my mother. (根据汉语提示完成句子)

3 . That we should wear masks in public places during the epidemic(疫情) is necessary.(用It做形式主语改写句子)

4 . The man is my new colleague. The man’s name is new to me.(用非限制性定语从句改写句子)

6 . How would you feel if moving to a new town meant _______________(不了解……的情况) your friends? （根据汉语提示补全句子）

7 . ________ (锻炼) at a gym or swim twice a week. (根据汉语提示完成句子)

8 . The economy has slowed down. ___________ ___________(结果), the ordinary people will have a hard time. (根据汉语提示完成句子)

9 . They finally ______(出现) at nearly midnight. (根据汉语提示完成句子)

10 . ______ your timely help, I did my experiment successfully.(幸亏)(根据汉语提示完成句子)