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
Tourism, _______ it brings in money to a country, can also result in damage to the World Heritage sites there．
A．once B．while C．if D．as
