.His conclusion, ______ on careful research, was acceptable.
| A．to base | B．to be based | C．basing | D．based |
______ on the portrait, mother was deep in thought.
| A．Fixed her eyes | B．Her eyes are fixed |
| C．Her eyes fixing | D．With her eyes fixed |
Seeing the sun _____ above the surface of the sea we burst out a shout of joy.
| A．to rise | B．to raise | C．rising | D．raising |
The news sounds _______.
| A．Encouraging | B．encouraged | C．encourage | D．to encourage |
Speech is ______ heard when it is given in a clear voice just slightly louder than normal.
| A．hardly | B．less | C．completely | D．best |
If no one _____ the phone at home, ring me at work.
| A．returns | B．replies | C．answers | D．receives |