If you don’t know how to use the word, you should _________ in a dictionary.

 _______ my book , _______ your book.

 I can’t find my ticket. I think I must have lost_____.

 ---Have you found your English book?---No, I haven’t found ________, but I borrowed ________ from Jack this afternoon.

 -- Did you read a book about customs last week?-- Yes, I found ______ very useful to know the customs of foreign countries.