42. A. secondly B. again C. also D. alone
43. A. suggestion B. conclusion C. decision D. discovery
44. A. with B. into C. for D. to
45. A. next B. clear C. final D. new
46. A. unexpectedly B. late C.clearly D. often
47. A. simple B. different C. quick D. sudden
48. A. fortunately B. easily C. clearly D.immediately
49. A. clean B. separate C. loosen D. remove
50. A. recorded B. completed C. tested D. accepeted
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