While paying for the gas,Mary’s mother told the seller about the nice night      she had spent at the Welcome Inn.

The new driving test seems to be challenging，so the chances ________ he can pass it at the first attempt are small.

She wrote a month ago, ______ we’ve heard nothing. 

Ａlot 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.

．What sets human beings apart from animals is not the pursuit of happiness, but the pursuit of meaning, ________ is unique to humans.