_________, the subject belongs to biology.
| A．Strictly spoken | B．Spoken strictly | C．Strictly speaking | D．Speaking strictly |
The most important _____ of his speech was that we should all work whole-heartedly for the people.
| A．element | B．spot | C．sense | D．point |
When I worked as the general manager of the firm, I sometimes had _____ to visit London on business.
| A．opportunity | B．possibility | C．occasion | D．chance |
These plastic flowers look so _____ that many people think they are real.
| A．beautiful | B．natural | C．artificial | D．similar |
It is clear that the whole world is passing through a social revolution in which a central _____ must be taken by scientists and technologists.
| A．process | B．attention | C．measure | D．part |
David paused to consult his notes, then_______ with his speech.
| A．proceeded | B．pursed | C．pronounced | D．proposed |