1.A->ea=/i/
B->ea=/i/
C->ea=/i/
D->ea=/e/
khoanh D
2.A->oo=/u/
B->oo=/u/
C->oo=/o/
D->oo=/u/
khoanh C
3.A->a=/ây/
B->a=/e/
C->a=/ây/
D->a=/ây/
khoanh B
4.A->i=/i/
B->i=/ai/
C->i=/ai/
D->i=/ai/
khoanh A
5.A->e=/i/
B->e=/e/
C->e=/e/
D->e=/e/
khoanh A
6.A->th=/th/
B->th=/d/
C->th=/d/
D->th=/d/
khoanh A
7.A->u=/u/
B->u=/ơ/
C->u=/u/
D->u=/u/
khoanh B
8.A->o=/ô/
B->o=/ô/
C->o=/o/
D->o=/ô/
khoanh C
9.A->c=/s/
B->c=/k/
C->c=/k/
D->c=/k/
khoanh A
10.A->w=/w/
B->w=/r/
C->w=/w/
D->w=/w/
khoanh B
Mong bn cho mik câu trả lời hay nhất, please nhá!