Circle the underlined word or phrase (A, B, C or D) in each sentence thatneeds correcting and then write your corrections in the spaces provided at the end of the sentence

Circle the underlined word or phrase (A, B, C or D) in each sentence that
needs correcting and then write your corrections in the spaces provided at the end of the sentence.
1. Water, the most common substance on earrth, it covers nearly 70% of the planet.
                     A                               B                             C         D
2. Prior the introduction of the washing machine, people spent hours cleaning clothes
         A                                                   B                                                  C
on rocks in rivers and streams.
3. The center of the earth consists of a ball-shaped core that scientists believe is
          A                                                         B                                                      C
matter solid.
    D 
                            Giúp mik vs mik đg cần gấp, cammom nhiều nha :)))