Combine each pair of sentences into one sentence using an appropriate relative clause: The city is heavily polluted. I was born in that city.

Rewrite the following sentences using reduced relative clauses: The students who are participating in the competition must register early.

Rewrite the following sentences using reduced relative clauses: The last person who left the building forgot to lock the door.

Rewrite the following sentences using reduced relative clauses: The equipment that is used in this process is highly sophisticated.

Combine each pair of sentences into one sentence using an appropriate relative clause: The experiment failed. The results of the experiment had been anticipated with great confidence.

Combine each pair of sentences into one sentence using an appropriate relative clause: She couldn’t attend the meeting. This upset her manager.

Combine each pair of sentences into one sentence using an appropriate relative clause: The policy was implemented nationwide. Its long-term effects remain uncertain.

Combine each pair of sentences into one sentence using an appropriate relative clause: The researcher made a groundbreaking discovery. I spoke to her yesterday.

Fill in each blank with an appropriate relative pronoun or relative adverb: This is the laboratory ______ the experiment was conducted.

Combine each pair of sentences into one sentence using an appropriate relative clause: The woman is a leading scientist. Her research won the award.

Fill in each blank with an appropriate relative pronoun or relative adverb: The documents, all of ______ were classified, were destroyed.

Rewrite the following sentences using reduced relative clauses: The only solution that is acceptable to all parties must be implemented immediately.

Combine each pair of sentences into one sentence using an appropriate relative clause: The project was a failure. He invested a lot of time in it.