${I/}$

${1.}$ Fossil fuels won't be burnt for energy in the future.

→ bị động TLĐ: S + will(not) + be + V3/ed + (by+O) + time

${2.}$ Because Trung was sick, he didn't go to school this morning.

→ Because + S + V, S + V: Bởi vì ...

= Because of + N/V_ing, S + V

${3.}$ Although it is very noisy in the city, we enjoy living there.

→ S + V + but + S + V: ... nhưng ...

= Although + S + V, S + V

${4.}$ We were disappointed at the failure of the team.

→ be disappointed at sth: cảm thấy thất vọng về thứ gì đó 

${II/}$

${5.}$ Sources of energy will be used more effectively for our future.

→ bị động TLĐ

${6.}$ The use of biogas will be increased for cooking by people in the countryside.

→ bị động TLĐ

${7.}$ A hydro power station will be built in the North of the country next decade.

→ bị động TLĐ

${8.}$ The problem of energy shortage will be solved by using solar energy.

→ bị động TLĐ

`1.` Fossil fuels won't be burnt for energy in the future

→ Câu bị động thì TLĐ:

- S + will + be + V-ed/VpII + by + O

`2.` Because Trung was sick, he didn't go to school this morning

→ Because + S + V, Mệnh đề S + V = Because of + V-ing/N, Mệnh đề S + V

`3.` Although it is very noisy in the city, we enjoy living there

→ S + V + but + S + V = Although + S + V, S + V

`4.` We were disappointed at the failure of the team.

`5.` Sources of energy will be used more effectively for our future

→ Câu bị động thì TLĐ

- S + will + be + V-ed/VpII + by + O

`6.` The use of biogas will be increased for cooking by people in the countryside

→ Câu bị động thì TLĐ

- S + will + be + V-ed/VpII + by + O

`7.` A hydropower station will be built in the North of the country next decade

→ Câu bị động thì TLĐ

- S + will + be + V-ed/VpII + by + O

`8.`The problem of energy shortage will be solved by using solar energy

→ Câu bị động thì TLĐ

- S + will + be + V-ed/VpII + by + O