77. We will probably go to the Moon for our summer holidays in 2050.

78. Mrs. Nga doesn't have much experience of working as a librarian.

79. If people throw rubbish into the right bin, they will keep the environment clean.

80. You can learn a lot from watching but you shouldn't watch TV too much or you will hurt your eyes.

81. We are talking to firefighters and checking out different strucks.

83. Why did she miss a week's lesson?

77 We will probably go to the Moon for our summer holidays in 2025 .

78 Mrs Nga doesn't have much experience of working as a librarian.

79 If people throw rubbish into the right bin, they will keep the environment clean... ( mình thấy từ cho sẵn hơi bất hợp lí ấy ạ)

80 You can learn a lot from watching but you shouldn't watch TV too much or you will hurt your eyes.

81 We are talking to firefighters and checking out different strucks.

83 Why did she miss a week's lessons?