38.　 We had already got to the top of the hill when the sun r____________ red. 　

37.　 The time is r____________ for taking actions.　 　

36.　 He experienced the Great Cultural R______________ when he was young.　 　

35.　 I hope your new book gets good r______________.

34.　 On r____________ to his house from work ,he found a letter in the mail-box. 　

33.　 He worked very hard. As a r___________ ,he got a great success in his experiment. 　

32.　 Is there a r______________ near here? I’m hungry now.　 　

31.　 Please allow me to express our warm welcome to our r______________ guests.　 　

30.　 The results of the r_______show that the earth goes a little faster when it is closer to the sun.

29.　 The teacher r________　 that all the work should be finished before school was over.