Question 40: FInd mistakes and correct Residents some cities can call an electrical inspector to have the wiring in their house to be checked.
Explain:
Have sth done (v): something done for (by someone) (not by the subject)
Have sb do (v): ask someone to do something for you
Edit: to be checked=> checked
Residents in some cities can call the electrician to have the electrical system in their house checked.
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