Question

9. Combine the two simple sentences in each pair to make one complex sentence. Choose the
appropriate linking word.

1 You do an experiment. Follow the instructions carefully. (where / when)

2. You do an experiment with chemicals. Put on safety goggles. (before/aften

3. Do messy experiments outside. You won't mess up your house or classroom. when/where

4. Do not talk on your cell phone. You are doing an experiment. (before / while)​

Answer 1

1. When you do an experiment. Follow the instructions carefully.
2. Before you do an experiment with chemichals, put on safety googles.
3. When you do messy experiments outside, you won't mess up your house or classroom.
4. Do not talk on your cell phone while you are doing an experiment.

• Espero que haya ayudado!