The present perfect tense is used to ask about a past action that had a significant impact or result. 'Has' is the correct auxiliary for the singular subject 'how'.
La respuesta correcta es 'has'.
| Question | How … the book helped you? |
|---|---|
| Title | 884 |
| QType (0=kprim,1=mc,2=sc) | 2 |
| Q_1 | did |
| Q_2 | has |
| Q_3 | will |
| Answers | 0 1 0 |
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