`55` . We might go to the moon for our summer holidays in 2050
( might + Vinf : Sẽ làm j trong tương lai nhưng khả năng xảy ra thấp )
`56` . If we didn't use the car all the time , we wouldn't make the air dirty
( Câu điều kiện loại `2` )
`57` . Are there twenty-five students in your class ?
( Are there = Does your class have ..... : Hỏi về số lượng h/sinh)
`58` . If we don't protect the environment , we will destroy ourselves
( Unless = If not )
`59` . Unless she is more hardworking , she won't get high marks
`60` . How far is it from Phuc Yen to Vinh Yen ?
