A. atfifth B. atten C. ontwo D. tilltenth
A. twenty B. thetwentieth C. twentieth/ D. thetwenty
A. at B. on C. of D. in
A. in1980s B. inthe1980 C. inthe1980s D. onthe1980\'s
A. onhisfifty B. ageoffifty C. whenhefifty D. inhisfifties
A. ateightyesterdaymorning B. yesterdaymorningeight C. yesterdaymorningateight D. byeightyesterdaymorning
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