You can take as many books as you like here for they are free of ________.

My trousers are too old.I’ll have to buy ____.

The main reason why Apple’s products always manage to capture the imagination of people worldwide is their attention to _____. Each and every part of an Apple product is perfect in its body. 

She’s such a smart ___ that she can type 150 words in one minute.

 Don’t try to persuade your boss；he won’t have the       of employing me—a fresh student.