Tony can’t have received the invitation. ________, he would have attended your birthday party yesterday.
| A．Therefore | B．Otherwise | C．However | D．Besides |
With the development of science, more new technology _______ to the fields of IT.
| A．has introduced | B．is being introduced |
| C．is introduced | D．was introduced |
The students _____ ￡50 a year to cover the cost of books and stationery.
| A．give | B．are given |
| C．have given | D．to give |
I’ll come after the meeting if time ______.
| A．permits | B．is permitting |
| C．is permitted | D．has permitted |
New medicines and instruments ______ every day to extend life.
| A．develop | B．are being developed |
| C．are developing | D．have developed |
What I wanted to know was when and where the meeting ______.
| A．was holding | B．had held |
| C．was to hold | D．was to be held |