Exercise 1. Write S for simple sentences and C for compound sentences.

_______ 1. This exercise is easy, but they can’t do it.

_______ 2. It’s raining outside; however, they are working in the garden.

_______ 3. Tom and I are good friends.

_______ 4. Teenagers spend a lot of time surfing the Internet nowadays.

_______ 5. Jack went to school late, for he got up late.

_______ 6. Tony works hard; therefore, he always gets a bonus.

_______ 7. Lisa uses social networks five hours a day.

_______ 8. You can choose the blue shirt or the green one.

_______ 9. The kids are talking to each other through video chat.

_______ 10. You should leave now; otherwise, you will miss the bus.