Ex 5. Give the correct form of the words in the brackets.
1. Her speech on the environment was ……………………(meaning)
2. My teacher is so ……………………..when we don't understand something. (help)
3. I was ……………….to stop the dog biting me. (help)
4. This dictionary is so………………………...( use)
5 Every day we hear about new ………………in science and technology. (develop)  
6. Einstein was one of the greatest …………………….in the world. (science)  
7 The USA is a world leader in space………………………. (explore) 
8. Advances in ……………science will help people live longer in the future. (medicine)  
9. There is a link between ………….  development and the environment. (economy)  
10. He drives very (care)…………………………. .He is sure to have an accident.                  
11. Environmental (protect)…………………… is every one’s responsibility.                
V. Choose the words or phrases that are not correct ,then correct it.
1.     Anne got mark 10 in math so she felt very happily.
                 A                   B                    C              D
2.     The house painted more than five years ago, so I’m going to repaint it.
                             A                B                                     C                         D
3.     A lot of crops can’t be grew in the mountains because itgets too cold.
                                A           B                                            C   D              
4.     The telephone was invented  with a Scotsman, Alexander G. Bell, in 1876.
                               A                     B            C                                        D
5.     We reached the nearest village after walked for five hours.
                  A                B                            C               D
6.     Would you likecomingto my birthday party?
          A             B       C       D 
7.     As soon as Sylvia and Ronald will arrive, the meeting canstart.
              A                                               B                             C    D
 10. It’s very difficult for studentsto answer all of the question in fifteen minutes.
        A                               B                C                          D     
11. The project will be show to the public when it is finished,
                           A           B         C                          D
12. The government wants everyone torecycle 25% of their household wasting.
                                    A                    B      C                                                  D