21. They believed that the fire was caused by a short circus in the lift machinery.
=> It was believed that ____________________________________________
=>The fire was believed __________________________________________
22. We are going to ask the plumper to install a new shower.
=> We are going to _____________________________________________
=> The plumper _______________________________________________
23. It is over five years since Lisa last visited the museum.
=> Lisa has not _________________________________________________
=> Lisa last visited _____________________________________________
=> The last time _____________________________________________
24. The sun heats the earth. This is very important to us. (use RELATIVE CLAUSE)
=>The sun __________________________________________________