Error Spotting - Tense & Preposition — Set 11

After they had finished their discussion, they have decided to implement the plan.

He is concerned about the upcoming changes and wants to know more details.

By the time we had reached home, it have already started raining heavily.

She is very good at singing and participating in musical competitions regularly.

Either the students or the teacher have to submit the final project by Friday.

Not only the author but also the editors have worked on this book carefully.

Both the parents and the child are happy with the school environment.

She have already finished her work and is ready to leave now.

He is enthusiastic about learning new languages and cultures from around the world.

Before he had gone to sleep, he have completed all his homework assignments.