题文
He _____ more than 5,000 English words when he entered the university at the age of 15.
| A.has learned | B.would have learned |
| C.learned | D.had learned |
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He _____ more than 5,000 English words when he entered the university at the age of 15.
| A.has learned | B.would have learned |
| C.learned | D.had learned |
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