1£®In some parts of the world, you ________ boil the water before drinking it.

2£®I didn't see her in the meeting room this morning. She ________ have missed the meeting.

3£®You ________ keep a first­aid box at home for any accident.

4£®You ________ run, for we have enough time to catch the train.

5£®— You ________ have finished the article. The deadline is last Friday.

— Sorry. I have been busy these days. Could you give me 3 more days?

6£®— ________________ I water the trees on Tuesday?

— No, you needn't.