‘I’____the first letter in the word‘irregular’,and there is___‘u’and ___‘l’in it.

Do you know where Mary is I couldn’t findher anywhere.—Well . She havegone far—her coat’s still here.

下列各句中，表达得体的一句是

— Why do you do volunteer work in the North-West?— I_______ to improve the lives of the children there through my efforts.

Excuse me，could you tell me how long___________ the book