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A) Hardly did he return C) No sooner did he return B) Hardly had he returned D) No sooner had he returned

47. Many people who had trouble in school later __________ to be creative geniuses.

A) turned out C) turned off B) turned down D) turned on

48. Safety measures are often _____ by some companies in the drive to increase profit.

A) confused B) enclosed

C) ignored D) launched

49. If only she _____ the police, everything would have been all right.