1. which all describe the kind of sleep that can be ________ at a moment's notice.

2. I honestly wouldn't trust either of them. They both think the same way and they're two of a ________ .

3. You can take a cat nap beside the fire or doze off on a train ________

4. I do apologise for talking to you a minute ago only I ________ you for one of my colleagues, who looks exactly like you.

5. But if you have no ________ at all, the best thing is to drop off or nod off in the middle of the conversation.

6. It's a waste of time asking them for their opinion as they're bound to object because they've been ________ against the idea from the start.

7. And ________ very important people are not described as simply going to bed but rather retiring for the night.

8. I worked out the answer in the end by putting two and two ________ .

9. Somehow it sounds just a bit more ________ .

10. Well, I think if you don't ________