They decided to leave the waiter a big _____ because the food and service had been excellent.
| A．note | B．reward | C．tip | D．gift |
Whenever I'm in trouble, I hear a voice ________ in my head “You can do it”．
| A．to ring | B．ringing |
| C．rung | D．having rung |
My office wasn't far from Chinatown, ________I found some very good Chinese restaurants．
| A．which | B．whose | C．when | D．where |
_________to the house owner, the designer had a clear idea of what to do．
| A．To talk | B．Talked |
| C．Having talked | D．Being talked |
The food_______in this way keeps fresh．
| A．prepare | B．preparing |
| C．to prepare | D．prepared |
__________most people come here for skiing, there are plenty of other things to do．
| A．Although | B．Once |
| C．Since | D．If |