Only after they had carried out over ten experiments ______ the decision.
| A．they reached | B．they reach | C．did they reach | D．do they reach |
New ideas sometimes have to wait for years before ________.
| A．being fully accepted | B．fully accepted |
| C．fully accepting | D．fully being accepting |
________ the past，our life is much better.
| A．Comparing with | B．Be compared |
| C．To compare with | D．Compared with |
________ for several weeks，the city needed food.
| A．As having flooded | B．Being flooded |
| C．Having been flooded | D．To flood |
I went to see him，________ him out.
| A．finding | B．find |
| C．only to find | D．to finding |
Volunteering gives you a chance ________ lives, including your own.
| A．change | B．changing | C．changed | D．to change |