Điền vào chỗ trống :

a) s hay x ?

- hoa ...en, ...en lẫn,

- hoa ...úng, ...úng ...ính.

b) iêt hay iêc ?

- làm v..., bữa t...

- thời t..., thương t...

1 My mother is a good cooker
2 I adviced him :" Let's get up early to learn the lessons"
3 I prefer play soccer to play tennis
4 She is a good artist
5 You had better not make noise in hospital