He is so busy. He cannot afford enough time with his son ______ he wants to.
About 60 percent of the students ________ from the south,the rest of them ________ from the north and foreign countries.
They were _____ to hear of the news of her father’s death.
I’d rather the money went to a _______cause.
Parents need to teach their children how to behave______.
Helen was fully occupied_____business matters, so we didn’t want to brother her.