2.　　　 We must be c_________ before danger.

1.　　　 My uncle suffered from a serious disease. Luckily he has r_____ now.

40. In China, those who want to enter universities have to _______ the entrance exams in June.

　 A. check through　　 B. work through　　 C. look through　　 D. go through

39. The teacher told us that light _______ faster than sound.

　 A. traveled　　 B. had traveled　　 C. is traveling　　 D. travels