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

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

Young ______ he is, he has proved to be an able salesman.A．thatB．whoC．asD．which

He hopes that the little favor______he has been able to do does good to them.A．whatB．thatC

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

In no country other than England, it has been said, ______one experience four seasons in t

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