If anyone knows of recent research about this topic, I would greatly appreciate
_____.
| A．that | B．this | C． it | D．one |
Thenumberofpeopleinvited______fifty,butanumberofthem____absentfor differentreasons.
| A．were； was | B．was； was | C．was；were | D．were； were |
You, who ______ his good friend, should help him get out of trouble.
| A．am | B．is | C．are | D．was |
More than one student _________ read the novels, which _________ written by David.
| A．has, was | B．have, were | C．has, were | D．have, was |
The boy, rather than his friends, _________ for the accident.
| A．are responsible | B．were responsible |
| C．be responsible | D．is responsible |
A poet and artist ____ coming to speak to us about Chinese literature and painting tomorrow afternoon.
| A．is | B．are | C．was | D．were |