There was a man crying over there．He _______ himself．
| A．could hurt | B．might hurt | C．must have hurt | D．might have hurt |
I will visit Austria ______ the invitation of my friend this summer vacation．
| A．by | B．for | C．to | D．at |
—Is there any mail?
—No, ______ at all．
| A．nothing | B．none | C．no one | D．neither |
Programmes, ______ to bring the old and the young together, are growing in popularity all over the world．
| A．designed | B．to be designed |
| C．designing | D．having designed |
David _____ a customer when the fire started．
| A．served | B．was serving | C．had served | D．would serve |
Martin drove along ______ he found a convenient parking place．
| A．after | B．when | C．until | D．since |