| Question | Transfer this Active Voice sentence into the Passive one: Workers installed an air conditioning system at his house 4 days ago. |
|---|---|
| Title | 772 |
| QType (0=kprim,1=mc,2=sc) | 2 |
| Q_1 | He installed his home air conditioning system 4 days ago. |
| Q_2 | He had his home air conditioning system installed 4 days ago. |
| Q_3 | He had his home air conditioning system been installed 4 days ago. |
| Q_4 | He had his home air conditioning system had installed 4 days ago. |
| Answers | 0 1 0 0 |
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