What is the foundation of the unique deep－sea communities？A．Reef.B．Black coral.C．Fish.D．Co

Which is the right order of what happened？ （)a．My family moved from Russia to the U． S． A

What is the main idea of the news item？A．A fire broke out when people were busy scooping u

What can we infer from the conversation？A．The survey is aimed at solving problems of the u

What is the passages main idea？A．Thousands of people were punished because of salt.B．The u

What is the main topic of this news？A．U.S.security agencies" failure in communication.B．U.

The sense of sound is one of our most important means of knowing what is going on around u