问题
选择题
My mother was doing some ______ when her mobile phone ______ suddenly. [ ]
A. shoppers; is ringing
B. shopping; rings
C. shopping; rang
D. shopping; is ringing
答案
答案：C
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My mother was doing some ______ when her mobile phone ______ suddenly. [ ]
A. shoppers; is ringing
B. shopping; rings
C. shopping; rang
D. shopping; is ringing
答案：C