一 When did the computer crash?一 This morning, while Ithe reading materials downloaded from some websites.

The Great Wall is so good a place________ many foreign people come to visit ________ it has become well knownall over the world

Can you help me ________ my homework

Karaoke, which was invented by the Japanese, ______ both wonders and problems

Could I speak to__________ is in charge ofInternational Sales please