Change the following sentences into passive voice: 1. You should keep flowers in a warm sunny place 2. Nobody can solve the mystery 3. You must put out all smoking materials 4. You must fasten the seat belt 5. Our government will make more progress in gender discrimination 6. You should read the safety instructions 7. They need not buy bread 8. You ought to wash the car 9. People may elect hom the new president 10. Will the teacher test our English? 11. Could Jenny look the door?

Từng câu trả lời của mình là:
Câu 1:
Flowers should be kept in a warm sunny place
Câu 2:

--> Chủ từ mang nghĩa phủ định "Nobody" thì chia "be" cũng phải phủ định

=> The mystery can't be solved
Câu 3:
All smoking materials must be put out
Câu 4:
The seat belt must be fastened
Câu 5:
More progress in gender discrimination will be made by our Government

*Our Government là chủ từ cụ thể
Câu 6:
The safety intructions should be read
Câu 7:
Bread needn't be bought
Câu 8:
The car ought to be washed
Câu 9:
The new president may be elected hom
Câu 10:
Will our English be tested?

Câu 11:

Could the door be looked by Jenny?
Mời bạn tham khảo các cấu trúc bên dưới!

*Lưu ý nữa: Động từ khiếm khuyết"Modal verb" cũng giữ nguyên

Mong các câu trả lời giúp ích cho bạn!!!