50. We waited a long time ___________ the train arrived.
A. when B. since C. while D. before
49. Scientists say people with cancer should not take aspirin ________ they are advised to do so by a doctor.
A. if B. unless C. in case D. for fear
48. I can’t thank you _____much for your kindness, because without your help I can’t have
succeeded in the exam.
A. too B. very B. quite D. that
47. After graduation she reached a point in her career _______ she needed to decide what to do.
A. which B. where C. what D. that
46. The Korean TV show, Rang-rang 18 seh, ______ young female Chinese audiences.
A. fills out B. puts aside C. corresponds to D. caters to
45. It was funny to see that the dog’s eyes immediately ________ at the sight of its owner.
A. lit up B. fixed up C. did up D. turned up
44. We must _____ a new teacher at once to the mountain school.
A. appreciate B. appoint C. appeal D. approach