If you’ve finished, we can have a coffee. ________, you’d better keep working.
| A．If so | B．Only if | C．If not | D．If only |
________ 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 |
________ basic first－aid techniques will help you respond quickly to emergencies.
| A．Known | B．Having known |
| C．Knowing | D．Being known |
________at the cafeteria before，Tina didn't want to eat there again.
| A．Having eaten | B．To eat |
| C．Eat | D．Eating |