19.-The book by Tony Garrison is of great use to our course.-But I think this one is_______worth reading.
He admitted ____________ in the examination .
Tim ,don’t ______________ the fire or you will get burnt .
Doctors and nurses tried their best to make the patient feel _________ .
He turned his back __________ me and refused to lend me any money when I lost my job .
__________ the course very difficult , she decided to move to a lower level .