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`1.` The problem of energy shortage will be used by using solar energy.

Giải thích: Bị động tương lai đơn: will be Vpp

`2.` Although it rained hard yesterday, we went to school on time.

Giải thích: Although + Mệnh đề: mặc dù

`3.` Because he was lazy, he got bad mark.

Giải thích: Because + Mệnh đề: bởi vì

`4.` If we didn't use the car all time, we wouldn't make the air dirty.

Giải thích: Câu điều kiện loại 2 diễn tả giả thiết trái ngược hiện tại: If S V-ed, S would/could/might V.

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`1.` This time tomorrow they will be playing soccer.

`2.` Solar energy will be used by many countries in the world.

`3.` We will travel in driverless cars in the future.

`4.` These toys are hers.

@ `Ly`