Please给下面句子改错～

Please给下面句子改错～
1.To the citizens of the United States,the bald eagle,America's national bird,symbolize strength and freedom.
2.The athlete,together with his coach and several relatives,are traveling to the Olympic Games.
3.The League secretary and monitor were asked to make a speech at the meeting.
4.Three weeks are allow for making the necessary preparations.
5.There are no known society in which left-handed people predominate.
6.What he says and what he does doesn't agree.
7.Among the favourite attractions at the National Air and Space Museum in Washington D.C.are the film presented on the five-tall screen.
8.In our country,every boy and every girl have the right to receive education.
9.The whole team is going to take part in the Olympic Games.
10.He is the only one of the students who have been a winner of scholarship for three years.
11.Tree fifths of the police has been trained on the rainy day in the school near the town.
12.---Is there anybody in the classroom?
---No,the teacher ,together with the students go to the playground.
13.---Are these your sheep?
---No.Mine is feeding on grass at the foot of the hill.
14.Sitting at the back of the room but in front of some old men and women were a very girl with two bright eyes.

1.symbolize-----symbolizes.
2.are---is.
3.were ---was.
4.are---is,
5.no---not
6.doesn't---dont't
7.film--------films
8.have---------has
9.is ---are
10.have--has
11.has---------have
12.go------goes
13.is --are
14.were-----was