While watching TV, ____.
| A．the doorbell rang | B．the doorbell rings |
| C．we heard the doorbell ring | D．we heard the doorbell rings |
A big whale was caught ________the coast by two fishermen.
| A．along | B．on | C．across | D．off |
Every student and every teacher ________.
| A．are going to attend the meeting | B．have attended the meeting |
| C．has attended the meeting | D．is attended the meeting |
I took mathematics and physics because I think that ________ very important for me to make further research in this field.
| A．what is | B．they are | C．this | D．which are |
Where to get the materials and how to get them ________ at the meeting.
| A．have not discussed | B．have not been discussed |
| C．has not discussed | D．has not been discussed |
All but Dick ________ in Class Three this term.
| A．are | B．is | C．were | D．was |