Lời giải của Bt a
1.the boy likes..a....school
2.mary sees .....a....mother everyday
3.my teacher bring....the... children to our place on sayurday
4the cat eats..the..food
5.i often forget...a...key
6.you write in. .the....book in class
7.we bring ...the....pencils to class
8.the men always bring..the..wives to the party
9.mr adams teaches ............class in the morning
10.she likes to give present to ....grandchildren
11.they never do.....homework
12.we love.......school
13.the bird alway sheeps....nest

1.a
2.a
3.the
4.the
5.a
6.the
7.the
8.the
9...