Etylaxetat có công thức hoá học là:

A. CH₃COOC₂H₅

B C₂H₅COOCH₃

C. C₂H₃COOCH₃

D CH₃COOC₂H₃

Đẹp ha! Cầu kì lắm nhỉ!

1. _______Will you be_________ (you/ be) free next Sunday?
2. I (collect) _______have collected__________ a lot of stamps from foreign countries so far.
3. Nam’s friends often (give)______give________ him stamps from other countries.
4. My brother hates (do) ________doing_________ the same things day after day.
5. My parents like (live) _______living________ in the countryside. I think they (move) _______will________ to our hometown next year

Thanks for reading!!!