We have various summer camps for your holidays； you can choose __________ based on your own interests.
| A．either |
| B．each |
| C．one |
| D．it |
Neither my wife nor I myself ____ able to persuade my daughter to change her mind．
| A．is | B．are | C．am | D．be |
Whatthescienceteacherdoesandsays _________ of greatimportance to college students.
| A．was | B．are | C．is | D．were |
The worker and poet _____ to the party the other day．
| A．is invited | B．was invited | C．had invited | D．invited |
Betweentworowsoftrees_____theteachingbuilding.
| A．stand | B．stands | C．standing | D．are |
Thenumberofpeopleinvited______fifty,butanumberofthem____absentfor differentreasons.
| A．were； was | B．was； was | C．was；were | D．were； were |