Helen was much kinder to her youngest son than to the others, ______, of course, made the others envy him.

 Great changes have taken place in my home town. It’s no longer ______ it was ten years ago, ______ I spent my childhood there.

The prize will go to the writer ________ story is most meaningful.

Only those ____knew well could be let in.

A lot of language learning ,_______has been discovered, is happening in the first year of life, so parents should talk much to their children during that period .