Complete the sentence with the correct form of the words in brackets.

1. When you come tonight, our group                    (practice) for our class presentation.

2. I                        (not/study) this evening. Do you want to go out?

3. What                          (do) this afternoon at 3PM?

4. We          (write) essays all semester for English 2. It is going to be a lot of work.

5. My brothers and I                           (not/camp) this weekend. We will be too busy studying for exams.

6. Tomorrow, I                         (sit) in the same seat that I am sitting in now.

EX2

Energy is used to____________ a lot of electrical things. (product)            

1. There will be a____________ of energy in the near future. (short)         

2. I don’t think so. The solar panels are becoming__________ and easy to install. (cheap)

3. Scientists are looking for clean and ____________ sources of energy. (effect)

4. I know it is also clean and safe to the environment. But does it cost a lot of money to install the____________ panels on the roofs? (sun