He is a key ____________ in the murder so we must protect him from all kinds of danger.
Tom, look at your shirt! It requires ________.
Mr. Smith thought of himself as _______,and this accident had ________ effect on his life.
He feels it dangerous for a girl to be out late at night, so he won’t have his daughter _______ home late.
-What about reading English newspapers while learning English? -Personally, __________. It helps a lot.
When will the government ______ its position on equal pay for equal work for woman?