One of the advantages of living on the top floor of a highrise is that you can get a good _______.   

--Late again !--Sorry. I was ________ halfway for half an hour on my way to work this morning.

 Thanks to the joint efforts made by the leaders of China and the US over recent years, mutually _______ Sino-US relations have made remarkable progress.

Faced with the bad economic situation overseas, more Chinese students are returning home after studying abroad, a _______ that looks likely to continue in the coming years, a report released this week says.

This important lesson by Professor Wang teaches primary students how to ______ themselves from danger.