straight as an arrow

Amazing how people can still haul this one out with a straight face.

She sat straight up in bed, and jerked her hands to her head, and screamed long and terribly.

This wasn't at all what he meant to say, and it sounded very ridiculous; but somehow the words wouldn't come straight.

She had listened—she had listened intently, looking straight out of the window and without moving.

It mounted straight as a plume for a little way, until it met the cool air of evening which was beginning to fall.

This judicial bent of the child is a curious one and often develops a priggish fondness for setting others morally straight.