I really can’t thank you enough, sir. — .
I often have conversations with John over telephone, while keep in touch with Tom by__________ letter.
I lost my way in complete darkness and, matters worse, it began to rain.
She had golden hair when she was a child, but_________ she got older and older, her hair went darker and darker.
__________she was invited to the ball made her very happy.
—ou___________ stop me.—Even if you __________it, I won't allow you to swim across the river.