Circle ‘that’ if it can be left out in the following sentences. Underline the emphasized information in each cleft sentence. 

1. The scientist introduced the idea, but it was her assistants that completed the work.

2. Don’t thank me. It was everyone’s efforts that we should be thankful for.

3. It was last weekend that he came to see us for the first time.

4. It is to gain experience that we want to take part in this volunteer work.

5. All of my teammates are excellent students, but it is Mary that I admire the most.