Exercise 15.2: The correct verb form

Fill in the blank with the correct form of the verb in the brackets.

Example: I have ____ (go) to lunch.
Answer: I have gone to lunch.

1. Dinosaurs were some of the biggest animals that have ever ____ (live) on the earth.

2. Scientists have ____ (discover) a lot about these creatures.

3. They are always ____ (find) new information.

4. Lately, scientists have been ____ (study) a new idea.

5. The idea is that dinosaurs might have ____ (have) warm blood - just like us!

Unit 15