After he had said good-bye to Jack, Tom ______ a bus and left the town.
| A．got down | B．got on | C．got into | D．got off |
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 |
Ten thousand dollars _____quite a large sum.
| A．are | B．is | C．were | D．have |
This is one of the best novels that ____appeared this year.
| A．have been | B．has | C．had been | D．have |