2. Can you imagine(想象) travelling alone _____ camel in Sahara Desert? You won’t get lost easily ______ camels.

A. by; on　　　　 B. in; by　　　　 C. on; by　　　　 D. by; in

1. Mr. Smith is so busy ______ his office work that he spends little time ______ after his children.

A. in; looking　　 B. with; to look　　 C. with; looking　 D. in; to look

39. do with/deal with　　　　　 40. the rest of

37. remain a mystery　　　　　 38. such a strange history

35. in the winter of 2006　　　　 36. serve as

33. (there is) no doubt　　　　　 34. no wonder

31. think highly of　　　　　　 32. take apart

29. tell the truth　　　　　　　 30. agree with

27. look into　　　　　　　　 28. rather than

25. insist on doing sth　　　　　 26. know about