This book is not really ________. It is a waste of money buying it

9. This book is not really ________. It is a waste of money buying it.
a. inform b. information c. informative d. informatively
10. Sometimes it is ________ to find suitable books for our children.
a. difficult b. difficulty c. difficultly d. difficulties
11. A book may be evaluated by a reader or professional writer to create a book ________.
a. review b. reviewing c. reviewer d. reviewed