`2` I think it is convenient to travel by the Segway
`->` S + think + it be + adj + to- V
`3` Because Biogas is abundant and clean , it will be used in the future
`->` Because + clause 1, clause 2 : bởi vì ..
`4` A hydropower station will be built in this area next year
`->` Câu BD thig TLD
S + will be + Vpp+ ...
`5` It is interesting to learn to drive this flying car .
`->` It's + adj + to- V : thế nào làm dì
`6` Because the weather is cold , people in Britain spend a lot of money on heating .
`->` Because + clause 1, clause 2 : bởi vì ..