问题
选择题
— Is your father still teaching?
— Yes. It's about sixteen years ______ he started teaching. [ ]
A. until
B. after
C. since
D. with
答案
答案：C
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— Is your father still teaching?
— Yes. It's about sixteen years ______ he started teaching. [ ]
A. until
B. after
C. since
D. with
答案：C