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V. Correct a mistake
1. Scientists have invented filters and other methods of removing pollutants out of industrial wastes.
2. Calcium, the most abundantly mineral in the body, works with phosphorus in maintaining our bones.
3. The composer Verdi has written the opera Aida to celebrate the opening of the Suez Canal, but unfortunately the opera
was not performed until 1871.
4. Wealthy people have always desired and wear precious stones because their beauty is lasting.
5. Every city in the United States has traffic problems because the amount of cars on American streets and highways
is increasing every year.
6. I honestly can't remember how long I have been waiting but it must have been since at least an hour.
7. The reason he wants to take a leaving of absence is that he needs a complete rest.
8. The next host for the event is Tanza; and it is Tanza's the first time as the host for the biannual event.
9. Her parents lived in America for 3 years, and then moved to Canada, where they spent other 4 years.
10. Tennis is such interesting game that people all like playing it.