`1`. It must be easy to ride a scooter

`@` Sth + adj to do

`=` It + ... + adj to do

`->` Nó như thế nào để làm gì 

`2`. Ours must be more powerful than yours

`@` Sở hữu cách của our là ours

`***` S + tobe + more adj/adj-er + than + S + V

`***` Ours: của chúng tôi 

`3`. You must be interest in hyperloops 

`@` Be + adj 

`4`. You mustn't travel such a long way by motorbike

`@` Such + a/an + Noun

`5`. Electric cars musn't pollute the air, however, they still cause traffic jams.

`-` In spite of + N/V-ing: mặc dù

`=` Although + S + V

`6`. I am talking to a classmate of mine

`@` My `-` mine: của tôi 

`7`. I go to school on foot because it's close to where I live.

`@` On foot: bằng chân

`-` Because + S + V: bởi vì `->` chỉ nguyên nhân

`8`. Because a solowheel runs on electricity, it is safe for the environment

`9`. We must travel to Phu Quoc by a plane.

`-` A + Noun chưa xác định

`-` An + noun chưa xác định

`10`. My friends prefer not to go by taxi because it's expensive

`@` go by sth: đi bằng cái gì

`***` prefer not to do sth: thích kh làm gì hơn