Chairman Xi Jinping had _______ friendly talk with US President Obama in ______ America last month.

Is_______ necessary to learn another language? — I think so.

I love music, and _____ father often takes me to the concert.

The student didn’t go to bed ______ eleven o’clock.[ ]

Sorry _____ being late. —It doesn’t matter. In fact, you ’re just on time______ it[ ]