`@CLKem`

`16`. there is many fresh air in the city

   `-` air là danh từ không đếm được → không dùng many.

   `=>`There is much fresh air in the city.

`17`. there isn't too many entertainment in my hometowm
   `-` entertainment là không đếm được → không dùng many
   `=>` There isn’t too much entertainment in my hometown.

`18`. we do not have much necessary facilities in town
    `-` facilities là danh từ đếm được số nhiều → không dùng much
    `=>` We do not have many necessary facilities in town.

`19`. there is a lots of fresh fruit and vegatables on my father's farm
    `=>` a lots of →  a lot of hoặc lots of

`20`. traffic jams are not a problrm in the country because there aren't too much vehicles
    `-` too much vehicles → vehicles là đếm được
    `=>`Traffic jams are not a problem in the country because there aren’t too many vehicles.