38.They found the lecture hard ().

35.Sam used to ()late with his roommates and play computer games.

34.Details of the underground trade were ()by the local newspaper.

33.Every policeman and fireman ()on the alert， especially during public holidays.

32.He ()on this essay for half an hour but he has written only about a hundred words.

31.In the densely ()part of the country， the problem of air pollution must be solved.

1、Directions: You are to write in no fewer than 100 words on the topic “The effect of my parent， teacher， or friend on my life”.Write your passage on the ANSWER SHEET.

50.The output of new energy vehicle this year is ()last year.

49.They had to put ()the meeting due to the ongoing COVID-19.

48.Though we hadn＇t met each other for 30 years， I recognized him()I saw him.

47.The Great Wall is a great tourist ()drawing millions of visitors every year.