Mark the letter A, B, C or D to indicate the correct answer to each of the following questions.

Question 8: Although thunder and lightning are produced at the same time, light waves travel faster _____, so we see the lightening before we hear the thunder.

A. than sound waves do

B. than sound waves are

C. do sound waves

D. sound waves

Although thunder and lightening are produced at the same time, light waves travel faster _____, so we see the lightening before we hear thunder.

A. the same as sound waves                       

B. than sound waves are

C. than sound waves seem                         

D. than do sound waves

* Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Although thunder and lightning are produced at the same time, light waves travel faster________, so we see the lightning before we hear the thunder.

A. do sound waves

B. than sound waves are 

C. than sound waves do

D. sound waves

The weather is not beautiful all of the time. Perhaps you can remember a day when bad weather made you afraid. One kind of bad weather that scares many people is called a thunderstorm. This is what happens when there is a thunderstorm. First, you see a sudden flash of bright light. A few seconds later you hear a loud rumbling sound. This quick flash is called lightning and the loud sound is called thunder. Lightning is colorful , but it can cause serious problems. Lightning is electricity that is moving very rapidly. It may be moving between a cloud and the ground, between two clouds, or between two parts of the same cloud. The lightning heats the air around it. This hot air expands, or get bigger, and it causes the air to move in waves. The air waves pass you in a series, one after another. For this reason, you may hear many rumbles and not just one sound.

____ 29/ Lightning may move between a cloud and the ground.

____ 30/ Thunder is a very bright light in a thunderstorm.

____ 31/ When you hear thunder you may hear a series of loud sounds and not one

big sound. This is because the air waves pass one after another.

____ 32/ Lightning always moves rapidly.

A thunder usually follows lightning by five seconds for every mile between the flash and the observer

A. A thunder

B.  seconds

C. every mile

D. between

Exercise 2.

1. The children  were frightening by the thunder and lightning.

     A                                  B                    C                        D

2. Two people got hurt in the accident and were took to the hospital by an ambulance.

                            A                   B                        C                    D

3. The students  helped by the clear explanation  that the teacher gave.

                              A                              B              C                        D

4. That alloy is composing by iron and tin.

      A                      B           C          D

5. The winner of the race  hasn’t been announcing yet.

     A               B                    C                   D

6. Progress is been made every day in all parts of the world.

                        A                    B          C                 D

7. When, where and by whom has the automobile invented?

      A                            B          C                                D

8. Each assembly kit is accompany  by detailed instruction.

      A          B                        C                    D

9. Arthur was giving an award  by the city for all of his efforts in crime prevention.

                    A                            B                C                  D

10. It was late and I was getting very worry about my son.

             A                        B                    C        D