It was the first time Mary _____ such a big opening ceremony.
| A．has attended | B．attended | C．had attended | D．should attend |
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 |
Most of his spare time ____spent in reading.
| A．are | B．were | C．was | D．have been |
Either you or I _____going to the teachers‘ office after class.
| A．am | B．is | C．are | D．will |