helppp meeeeeeeeeeeeeeeeeeeeeee~~

$\text{  2. This is the worst film which I have ever seen }$

$\text{  3. A bus which runs every half an hour goes to the airport }$

$\text{  4. He talked about the books and the authors that interested him }$

$\text{  5. The chemistry book which I bought was a little expensive }$

$\text{ Các liên từ ở đây là which và that }$

$#Chee$