Are you still mad at Lana—–No, it’s water under the bridge. I’ve forgotten it.

Where have you _____—I have _____the teachers’ office.

He spent too much time talking on _______ phone whilewe were all busy at _______ work

_____ the three elements of productive forces, namely, the people, the means of production and the subject of labor, the people is that most critical

We should know that we can only reach the top if we are ready to ____ and learn from failure.