Remember to ________ a good state of mind even if you should fail plenty of times．

With the loud noise going on in the workshop, I can hardly       on my lessons.

Many people think it’s very difficult to ______ a conversation with someone who only says “Yes” and “No”. 

. We should consider what use can _______ such a book.

His mother had thought that it would be good for his character to________from home and earn some money on his own.