dễ
Điền từ thích hợp:
1, You can improve your teeth if you ……………… health food
2, The cavity is not very serious. Your other ……………… are fine.
3, ……………… use an old toothbrush. It is not good at all.
4, Liz is two years older ……………… James.
5, Mary can read English, but ……………… can write it well.
6, I am glad ……………… hear that all of you are well