The word skyrocket in paragraph 4 could be best replaced by ______. 

a. Lan: And when they type on tablets, they can change or add more things any time they want.

b. Lan: I think electronic devices make school life easier and more enjoyable.

c. Minh: Exactly. Students who hate homework can have fun doing it on tablets.

(Adapted from Tiếng Anh thí điểm)

a. Tom: Don’t worry, we’ll be in the car soon, and it won’t take long to get home.

b. Tom’s grandma: Good, I’ll be glad to get away from this noisy station.

c. Tom: Yes, it’s really crowded today, isn’t it?

d. Tom: Hello, Grandma. Can I carry your case?

e. Tom’s grandma: Oh, that’s nice of you. Thank you for coming to pick me up. Travelling always makes me so nervous.

(Adapted from PET)