By the end of last year the students (learn) ______ nine subjects.had learnt本题考查

游客2023-10-08  24

问题 By the end of last year the students (learn) ______ nine subjects.

选项

答案 had learnt

解析 本题考查时态。此句的时间状语是by the end of last year,由此可以判断该句为过去完成时。
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