在下列各句的空白处填入一个适当的词， 使句子意思完整，语法正确。

1. My mother left her white              in the taxi. It has a few cards, a set of keys and

    nearly 300 yuan in it.

2. — Sam, could you              the flowers three times a week while I am on holiday? 

    — Certainly.

3. I think doing some exercise can make you feel _______ after a day's work.

4. — Did you learn to drive the car              yourself, Nancy? 

    — Oh, no. My father taught me. He is an excellent driver.

5. I hardly ever buy things according to the advertisements because              are often 

    confusing and misleading.