It is very kind ____ you to help me with my lessons.It is hard ____ me to learn them well.

The old man has run four laps(圈) around the pool, while the younger one was almost after only one lap.[ ]

________ New Year’s Eve, we can watch fireworks and enjoy performances.

What did your parents think about your decision?—They always let me do __________I think I should.

He’s _______ to fail the exam if he doesn’t do any revision.