Don’t be angry with us. We ____ with you together, but we were busy with our final reports when you called in.
| A．would eat out | B．must have eaten out |
| C．should eat out | D．could have eaten out |
Birds' singing is sometimes a warning to other birds __________ away.
| A．to stay | B．staying |
| C．stayed | D．stay |
__________ warm at night, I would fill the woodstove, and then set my alarm clock for midnight so I could refill it.
| A．Staying | B．Stayed |
| C．To stay | D．Stay |
I stopped the car __________ a short break as I was feeling tired.
| A．take | B．taking |
| C．to take | D．taken |
Volunteering gives you a chance __________ lives, including your own.
| A．change | B．changing |
| C．changed | D．to change |
I cannot __________ puzzled, for I simply cannot understand how I could have made such a stupid mistake.
| A．help feel | B．help but to feel |
| C．but to feel | D．but feel |