It’s more than half a century ________ my grandfather joined the Party and became a servant to the people.
The changes in our chemistry lab will cost quite a lot, ____ they will save us money in the long run.
The workers were making so much noise in the workshop, and the boss hurriedly went to see ____.
This is certainly the case, but ____ it is a mistake or not I don’t know.
Villagers often say our village is no longer ____ it used to be.
— ____ can I deal with such a situation? — Take ____ measure you think best.