We had a big meal in a fine restaurant last Monday and the total cost_______ five hundred dollars．

With a large number of people _____________ camping, it has now become one of the most popular activities in the UK.

The air in Dongying is much worse than that in many other cities. We must do to protect our environment.

One ______ easily lose his way when he visits or comes to a new place.—I agree with you.

Thank you for inviting me to enjoy the magic show.— . Just have fun!