39．spare no efforts to do替换try one’s best to do

38．express one’s satisfaction with替换be satisfied with

37．nevertheless替换however

36．on condition that替换as long as

35．attend to替换look after

34．become of替换 happen

　　 What do think has become of ( happened to ) him ?

33．be worn out替换 be tired / broken

　　 ① After five hours’ non-stop work, we were all worn out (tired).

　　 ② My shoes are worn out (broken). Please buy me a new pair.

32．consist of替换be made up of

　　 Our class consists of ( is made up of ) 50 students.

31．the majority of替换most

　　 The majority of (Most of ) the interviewees prefer watching TV at home to going to the cinema.

30．in the course of替换during

　　 In the course of (During) the mountain-climbing, please help each other and pay special attention to your safety.