.
By the time he realizes he ________ into a trap, it’ll be too late for him to do anything about it.
| A．walks | B．walked | C．had walked | D．has walked |
He was about to do his homework when an unusual noise ________ his attention.
| A．arrested | B．affected | C．attacked | D．attended |
—You seem to be familiar with New York.
—I _______ there for three years. It’s great to be back.
| A．live | B．had lived | C．have lived | D．lived |
—These grapes look really beautiful.
—They _______! See the price $3.99 a pound. Very expensive, aren’t they!
| A．might | B．could | C．would | D．should |
It is typical of students to stay up ________ deep into the night for the final exam.
| A．to read | B．having read | C．to have read | D．reading |
Lenovo has brought out a new laptop ________ low cost will make it attractive to students.
| A．which | B．where | C．whose | D．what |