根据首字母提示完成句子

1. He learned how to use sign language to c_____ with deaf customers.

2. Do remember to c______ my best wishes to your mother.

3. Speaking and writing are man's most important methods of c______.

4. London has poor road c_____ with the surrounding area, but the railway network is quite excellent.

5. SARS is a c______ disease.

6. He is c______ and is ready to talk With whoever likes to talk with him.