，I have never seen anyone who's as capable as John.

We shall go to help them_______we are free. 

 Mary's favorite is fiuit. _______ kind it is.

– What do you think of teaching, Bob?-- I find it fun and challenging. It is a job ________ you are doing something serious but interesting.

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.