_____, tears came down.
| A．Hearing the bad news | B．Heard the bad news |
| C．when to hear the bad news | D．When he heard the bad news |
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 |
The policeman stopped him when he was driving home and _____ him of speeding.
| A．charged | B．accused | C．blamed | D．deprived |
_________ that he was in great danger，Eric walked deeper into the forest．
| A．Not realized |
| B．Not to realize |
| C．Not realizing |
| D．Not to have realized |