I have made ______ clear that all of us are strongly against smoking in the office.
| A．this | B．it | C．that | D．one |
When and where to build the new factory ____yet.
| A．is not decided | B．are not decided |
| C．has not decided | D．have not decided |
Not only Tom but also his wife ____fond of watching television.
| A．are | B．were | C．be | D．is |
It ____I who _____leaving for London.
| A．is…is | B．am…is | C．is…am | D．am…am |
Mr Smith， together with his children， ____arrived.
| A．are | B．has | C．is | D．have |
About 20 percent of the work ____done yesterday.
| A．are | B．is | C．were | D．was |