We won’t give up _______ we should fail 10 times.
When I came in, I saw him ______ in a chair deep in thought.
Will you please spare me some ink? I have ______ it.
When we think of communication, we _____ think of using things, talking face to face, writing messages and so on.
He says he really can’t ______ to wait another day.
We were lost in the forest; ______, it became dark and began raining.