He is the only one of the students who a winner of scholarship for three years.
| A．is | B．are | C．have been | D．has been |
The number of people invited ____________ fifty, but a number of them __________ absent for different reasons.
| A．were; was | B．was; was | C．was; were | D．were; were |
Neither Tom nor Jack and I ____ his students.
| A．are | B．am | C．is | D．was |
The League secretary and monitor________asked to make a speech at the meeting last week.
| A．is | B．was | C．are | D．were |
Wang Lin failed to be admitted by Hong Kong University last year，and only then________the importance of English.
| A．he finally realized | B．he had realized | C．had he realized | D．did he realize |