Mark the letter A. B, C, or D to indicate the underlined part that needs correction

Exercise 2. Mark the letter A. B, C, or D to indicate the underlined part that needs correction

1.   The king's biodiesel oil project was first to introduce in 2001.

           A                                  B         C                D

2. The Tesla Coil is used for create extremely powerful electrical fields.

                                    A            B           C                            D

3. IBM is an artificial intelligence computer system and is used to answering questions posed in natural

                                                A                                               B             C                     D

language.

4. Lifc without computers has seemed simply impossible now.

                  A                               B             C             D

5. Kodak Company produced many OLED equipped products, which are being used to power the next

                                        A                                   B                                       C                     D

generation of ultra-thin televisions, since 1987.

6. Vaccination has been used for a long time for prevent diseases.

                           A        B                     C                   D

7. The boat rudder was invented to steer large ships, which enabled the Chinese for building huge ships as