问题
选择题
Mary___________ computer science last year.
A．studies
B．studied
C．will study
D．studying
答案
答案：B
时间状语last year表明本句是过去时态，所以选B。
搜题请搜索小程序“爱下问搜题”
Mary___________ computer science last year.
A．studies
B．studied
C．will study
D．studying
答案：B
时间状语last year表明本句是过去时态，所以选B。