làm hộ mik nhanh vs ạ

`37.`Although it is cold, they don't wear jackets

`-`Although + clause 

`38.` Many schools install solar panels on their roofs to provide electricity during daytime and reduce the cost of their monthly power bill

`-`to +Vinf

`-`on their roofs: chỉ vị trí trên mái nhà

`39.`My brother prefers reading science fiction books to watching movies

`-`prefer + V-ing + to + V-ing: thích cái gì hơn cái gì

`40.`The story of the film is silly. However, many people still enjoyed it

`-` Clause .However, + clause