better put things back______ Otherwise, it willbe difficult to find them

It has been proved taking exercise regularly does good to one’s health.

All the nations，powerful or not，should be ________harmony with each other.

I have been convinced that the print media are usually more _____ and more reliable than television. [ ]

An ant was drinking by a small river when it fell in.It made ______ efforts to reach the side，but made no progress at all.