I apologize if I__________you，but I assure you it was unintentional(无意的).

The accident happened at nine o’clock in the morning ____ we were all busy with our work [ ]

cords, ____, walkman CD and MD arethe same instruments that we can use to enjoy music

The Kiwi fruits in this supermarket are _______ sale now, and they are sold ______ the pound — Really? How much cheaper are they?

You have to know ________ you’re going if you are to plan the best way of getting there.