Verbos irregulares no Simple Past

Quais são as formas corretas desses verbos irregulares?

Questão 1:

They ? a new car last week.

1 brougt

2 buyed

3 bouyed

4 bought

Questão 2:

He ? a song at the karaoke bar.

1 sang

2 singed

3 sing

4 sung

Questão 3:

We ? to Paris for our vacation.

1 flied

2 flew

3 flought

4 flyed

Questão 4:

She ? a letter to her friend in Australia.

1 wrote

2 writed

3 write

4 written

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