We need to get to the root of the problem______ we can solve it.
When they had finished playing, the children were made to _______ all the toys they had taken out.
Do speak loudly while _______ yourself understood well.
_______ several times, he still turned a deaf ear to the typhoon forecast.
My uncle _________ in Taiwan for 20 years. Now he has settled down in mainland.
He claimed _______ in the supermarket when he was doing shopping yesterday.