I often have conversations with John over telephone, while keep in touch with Tom by__________ letter.
Elephants have their own way to tell the shape of an object and ________ it is rough or smooth.
I was surprised by her words, which made me recognize ________ silly mistakes I had made.
The poor young man is ready to accept ________ help he can get.
Mary wrote an article on ________ the team had failed to win the game.
Parents are taught to understand ________ important education is to their children’s future.