`IV.`

`16.` employer

`17.` businessman

`18.` excited

`19.` carelessly

`20.` better

`V.`

`21.` is explaining

`22.` have been

`23.` returned

`24.` iviting

`25.` was

`VI.`

`26.` because of `=>` because

`27.` get `=>` got

`28.` has `=>` have

`29.` are `=>` is

`30.` rides `=>` is riding

$#Mon_luctan$

Xin hay nhất ah!

16. There are about two hundred employees in this company.

17. Is Mrs. Ha a businessman?

18. We are all exciting about going to the zoo next weekend.

19. We mustn't be careless when we cross busy street.

20. John is better at English than me.

21. Keep silent please, our teacher is explaining the lesson.

22. We have been student for four years. 

23. I will send him the message as soon as he returns.

24. Thanks to invited me for the birthday party.

25. Peter couldn't read until he was eight years old.

26.