When you are speaking on the phone, you must convey the impression that this is an important conversation to you, ______ you are treating with great significance. 

I want to buy a car for my father, but haven’t found         he likes yet.

For quite a few students, their teacher’s advice is more important than _______ of their parents’.

Even if they are on sale, these refrigerators are equal in price to, if not more expensive than, _____ at the other store.

(2014·河南郑州高中毕业年级质量预测)Helen has been looking for a job over the whole year，feeling she can’t get________without work experience.