This is certainly the case, but ____ it is a mistake or not I don’t know.
| A．if | B．even though | C．whether | D．that |
Between the two rows of trees the teaching building.
| A．stand |
| B．stands |
| C．are standing |
| D．are |
This is one of the best novels whichonce popular among students.
| A．are |
| B．is |
| C．were |
| D．was |
Either Wu Hai or I going to the teachers’ office after class for the papers.
| A．am |
| B．is |
| C．are |
| D．have |
Tom as well as two of his classmatesinvited to the party, where they met some famous singers.
| A．was |
| B．were |
| C．have been |
| D．has been |
Right now the writer and managerbusy preparing for the following meeting.
| A．is |
| B．are |
| C．was |
| D．were |