题目内容


________ a two-year period, Nancy became addicted to painkillers （止疼药）.
A．BeyondB．AboveC．SinceD．Over
D
考查介词。Over a two-year period ="Over" a period of two在过去的两年时期内。句意：在两年的时期内,她对止痛药上了瘾。
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