It is immediately obvious that water is to be _______ to the development of life.
| A．compulsory | B．controversial | C．fundamental | D．supreme |
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 |
The League secretary and monitor ___ asked to make a speech at the meeting.
| A．is | B．was | C．are | D．were |
She is not worth .
| A．to get angry | B．getting angry | C．getting angry with | D．to get angry with |
His remarks left me about his real purpose.
| A．wonder | B．wondering | C．to wonder | D．wondered |
his father had come, his face lit up.
| A．Having heard | B．When he heard | C．Hearing | D．When hearing |