Are you familiar with the music?-Yes. There was a time _____ this kind of music was quite popular.

Life in the oceans _______ from the tiniest plankton all the way up to giants like sharks and whales.

I remember a _____ famous scientist saidthat we should believe in ourselves first of all.

Once a decision has been made, all of us should it.

下列各句中,没有语病的一项是(　　)