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49. He is eating like a horse ______he hadn’t had a decent meal for a month.

　 A. since　 　　　　　　　 B. as if　 　　　　　　 C. as　 　　　　　　　　 D. like　

48. -Did you remember to give Mary the money you owed her?

　 ­-Yes. I gave it to her _____ I saw her.

　 A. while　　 　　　　　　 B. the moment　 　 C. suddenly　　 　　 D. once

47. Hundreds of jobs _____ if the factory closes.

　 A. lose　　 　　　　　　　 B. will be lost　 　　 C. are lost　　 　　　 D. will lose

46. The men will have to wait all day _____ the doctor works faster.

　 A. if　　 　　　　　　　　　 B. unless　　 　　　　 C. whether　　 　　 D. that

45. What has happened ______all the audience look so excited?

A. thus　　 　　　　　　　　　　 B. in order that　 　 C. so as to　 　　　　 D. that

44. Someone called me up in the middle of the night, but they hung up _____ I could answer the

phone.

　 A. as　　 　　　　　　　　 B. since　　 　　　　　 C. until　 　　　　　　 D. before

43. The old man slipped on the stairs and fell down , ______breaking his left leg.

A. so　　 　　　　　　　　 B. thus　 　　　　　　 C. therefore　　 　　 D. hence

42. Earthworms occur ______adequate moisture and food and the necessary soil conditions are

　　　 found.

　 A. however　　 　　　　 B. and　 　　　　　　　 C. wherever　　 　　 D. but

41. He hid the fragments of the vase in the drawer ______his mother should discover them .

　 A. afraid of　 　　　　 B. in that　　 　　　　 C. in case　 　　　　 D. so that

40. Ships carry lifeboats _____ the crew can escape _____ the ship sinks.

　 A. so as to… if　　 　 B. so that…unless C. so that…if　　 　 D. in order that…in case that