DuoDuo is a great lone traveler crossing borders of nation, language and history, as well as a determined predictor of some of the most basic, universal human values that _____ in our troubled modern times.
| A．have been overlooked | B．have overlooked | C．has been overlooked | D．is overlooked |
Is ____ necessary to complete the design before National Day?
| A．this | B．that | C．it | D．he |
Was it during the Second World War_____ he died?
| A．that | B．while | C．in which | D．then |
Joan had often heard____ said that Marley had no money.
| A．it | B．this | C．that | D．one |
I hate___ when people talk with their mouths full.
| A．it | B．that | C．these | D．them |
The Parkers bought a new house but ____ will need a lot of work before they can move in.
| A．they | B．it | C．one | D．which |