______ is often the case, we have worked out the production plan.
He asked us to _______ him in carrying through the plan at the meeting yesterday.
Today, we’ll discuss a number of cases _______ parents have much difficulty in communicating with their children.
He failed the mid-term examination and only then _______ how much time he had wasted.
________confidence and the necessary equipment, they failed to rescue the 42 miners trapped in the coal mine.
A quarrel _________, which made him ______ his family.