8. It took me some time to ______ what was causing this.(本题5.0分)
A、 work out
B、 work with
C、 work in
D、 work at

答案是:

标准答案:A
出自  青书学堂  >  甘肃中医药-大学英语(专升本)

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本题添加时间:2023/4/3 12:59:00