Running is a good way ______ healthy.

The young man in Liaoning decided to go round China ___ bike

you explain ____ you have been late for schoolseveral times this term— Sorry, but it is the first time that I have beenlate this week

You’d better not eat too much salt. It’sbad for your health. —_________.

In order to keep the balance of ecosystem, every possible means _______to deal with the problems of the over-exploiting of natural resources