It has been proved that listening to simple, happy has a good effect onA．cows.B．workers.C．

It has been revealed that some government leaders

It has been revealed that some government leaders

From what has been discussed above, I firmly believe that time will prove that tradit

It has been proved that good weather can boost ones______.A．feelingB．emotionC．senseD．mood

No one can prove that the earth _____ not round.A.is beingB.is to beC.isD.has been

No one has been able to prove that fish is _____ better for the brain than many othe