He is afraid of ___________ strangers.
You can’t judge a book by its cover, ____________.
The door _______ open, no matter how hard she pushed.
Anyone, once _______ positive for H7N9 flu virus, will receive free medical treatment from our government.
In much of the animal world, night is the time ______ for sleep—pure and simple.
----Are you sure you won't come for a drink with us? ----_________, if you insist.