`16`.Although the main actress is beautiful , she didn't act so well

`\rightarrow` Although + C1 + C2 : Mặc dù

`17`.How far is it from Hai Phong to Thanh Hoa ?

`\rightarrow` Hỏi khoảng cách : How far is it + from N1 + to N2 ?

`18`.I used to play games

`\rightarrow` `\text{S + used to + V :}` Đã từng

`19`.Despite being a developed country , Singapore isn't polluted by industry

`\rightarrow` Despite / In spite of + V-ing / N + Clause : Mặc dù

`20`.Unless you stop swimming in that lake , you will have a rash

`\rightarrow` Unless `=` If not : Trừ phi

`\text{@ TheFox}`