单项选择题
It is obviously necessary that both the President and his advisers ______ down to earth.
单项选择题 The strike can be traced to the personal ______ of the foreman against the factory owner.
单项选择题 I am ______ grateful for the many kindnesses you have shown to my son.
单项选择题 Had he kept an eye on the business, his firm ______ the crisis.
