________ a two-year period, Nancy became
题型:选择题
问题:
________ a two-year period, Nancy became addicted to painkillers (止疼药).
A.Beyond
B.Above
C.Since
D.Over
________ a two-year period, Nancy became addicted to painkillers (止疼药).
A.Beyond
B.Above
C.Since
D.Over