The passage is mainly talking about______.A．not being a perfectionistB．details and major o

What is the passage mainly talking about？A．The popularity of video－on－demand.B．The competi

What does the passage mainly talk about？A．Winter is a harsh season to keep good mental hea

What does the passage mainly talk about？A．NASA is cooperating with private companies.B．The

This passage is mainly talking about______.A．the fast expanding of social networking sites

What is the passage mainly talking about？A．American children.B．American mother.C．American

The writer of the passage is talking about the Internet mainly on the basis of______.A．per