The computer centre, ______ last year, is very popular among the students in this school.
| A．open | B．opening |
| C．having opened | D．Opened |
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 |
Before __________stood a terrible man; Linda could do nothing __________.
| A．she; but cry | B．her; but cry |
| C．she; but to cry | D．her; but crying |
The girl sat in front of the television every evening, happy __________ anything that happened about the Olympic Games in London.
| A．to watch | B．watching |
| C．watched | D．to have watched |