He had been _______ good terms with Tom, but all of ____ sudden they lost in touch with each other.
| A．on ; a | B．in ; / | C．on ; the | D．in ; a |
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 |
-I hear Mr. Black is ill in hospital again.
-What a poor man ！ I can't help but __________ sorry for him.
| A．feel | B．to feel |
| C．felt | D．feeling |
If he takes on this work, he will have no choice but __________ an even greater challenge.
| A．meets | B．meeting |
| C．meet | D．to meet |