根据句子意思，用括号中所给单词的正确形式填空。

1. Something is wrong with your car. Don't worry, you can use __________ (we).

2. The __________ (high) you climb, the more beautiful view you will see.

3. Nancy is patient and she doesn't give up __________ (easy).

4. From June 1, supermarkets in China will not provide plastic bags (塑料袋) for free.

    If__________ (shop) need one, they have to pay.

5. He seemed __________ (friend) at first, but now I've got to know him and I realize

    he's warm and kind.