17. They can't be working now. It's time they ________ the office.
He was about to do his homework when an unusual noise ________ his attention.
—You seem to be familiar with New York. —I _______ there for three years. It’s great to be back.
—These grapes look really beautiful. —They _______! See the price $3.99 a pound. Very expensive, aren’t they!
It is typical of students to stay up ________ deep into the night for the final exam.
Lenovo has brought out a new laptop ________ low cost will make it attractive to students.