Please put on more clothes. It is ___ that it will be a bit colder this afternoon.

It won’t be easy, but we’ll get across the river ______.

—How did you sleep last night?  —Like a log. Never slept ____. 

As soon as his teacher begins lecturing, he begins to doze off, not intentionally but _______.

After watching a movie Avatar, Mary lay in bed with her eyes ______ open while all her family were ______ asleep．