Thetelephone（invent）byAlexande-优题课

The telephone　　（invent） by Alexander Graham Bell in 1876．

科目英语题型填空题难度中等

知识点：语法填空

You will not succeed　　（除非） you work hard．

The old man lives　　（独自地）， but he doesn't feel lonely．

It's our duty to　　（保护） the environment．

My home is so　　（远） away from our school that I have to take a bus to school．

Jackie Chan is not only an　　（演员） but also a singer．