Both are tetrads. The word "载" is pronounced as "承载" or "年", and "一边一边" is pronounced as "一边一边". When you say "side by side", it's pronounced in four tones.
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I. During the festival, people sing and dance to their hearts' content.
II. Everyone sang and danced and immersed themselves in a sea of celebration.
3. At the party, people sang and danced to their heart's content, and the atmosphere was very lively.
4. In a while all the children began to sing and dance.
V. On this grand festival, the Dai people sang and danced to celebrate the Water Splashing Festival.
VI. The whole country sang and danced to celebrate the return of Macau to China.
VII. When the Olympic Games came, the whole country greeted them with songs and dances.
VIII. It was a happy day and the square was full of people singing and dancing.
9. At the party, teachers and students sang and danced to celebrate the festival.
X. People sang and danced to celebrate the National Day.
Xi. The enemy finally surrendered and the soldiers celebrated their victory with songs and dances.
xii. At the welcome party, people sang and danced to welcome the new students.
Thirteen, she sings and dances on the table when she has a whim.
XIV. The people, on the other hand, were overjoyed and welcomed the soldiers with songs and dances.
Fifteen, she saw her own singing and dancing image at the center of the stage again.
XVI. Thousands of people were singing and dancing in the square to celebrate the victory.
Seventeen, people sang and danced to celebrate the triumphant return of Shenzhou VI.
18. At the gala, Xiao Hong sang and danced and won a lot of applause.