18. ---- Are you free after school?

---- Sorry. I’ve planned to treat a friend of mine to dinner _______for his help.

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。

选项中有两项为多余选项。

Most people know that chocolate is made from cocoa and that the origins of chocolate can be traced back to Central and South America.   1.  But how did chocolate go from being the food of the gods to being the food of love?

       2.   They established the first cocoa plantation and used the cocoa beans as the main ingredient in a dark, bitter drink that we would call “chocolate”. The Mayas believed that chocolate had mystical properties.    3.  In fact, cocoa beans were used as a form of currency that was worth its weight in gold.

Spanish conquistador Hernando Cortez was the first European explorer to realize cocoa’s commercial possibilities.   4.   In 1529, Cortez returned Spain and introduced chocolate——as a drink mixed with sugar, vanilla, and cinnamon——to European society.

It caught on, especially with the nobility. As its popularity spread, people found new ways to make and use chocolate.   5.   Whether it is in delectable desserts or crunchy candy, people all over the world are still in love with chocolate.

A. But cocoa also had commercial value.

B. But not all the people all over the world love cocoa.

C. For centuries, the native there regarded cocoa as a gift from the gods.

D. When he arrived in the New World in 1519, he soon established his own cocoa plantation.

E. Around A. D. 600, the Mayas were the main aboriginal group in Central America.

F. These days, chocolate is enjoyed as both a tasty treat and a romantic indulgence.

G. Doctors said cocoa plays an active part in medicine.

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Some friends invite you over and serve you a delicious dinner. Someone loans you his car while yours is being repaired. You are sick, and a friend brings you a meal and cares for you   1    

Sometimes simply saying thank you is enough. At other times, it is thoughtful to say thank you in a more specific way. Be sure to tell that person what it is that you appreciate and why you appreciate it.

Here are some common ways to say thank you.

2   . People are very busy these days. A handwritten note shows you took time to tell some one you appreciate him or her. Or you can call and thank the person. You would be surprised how this can make someone’s day. Another idea is to send a thank-you e-mail or e-card.  3   

To say thank you in a creative way, you can:

★Select some flowers from a florist, Attach a thank-you note.

★Present the person with a basket of fresh fruit or a homemade treat.

★Treat a friend to a movie, meal, snack or coffee.

★Give a gift card for a bookstore or a restaurant.   4  

★Find out what the person likes and give something related to that.

★To say a big thank-you to some one, throw a party or have a barbecue in honor of that person.

As you can see, there are many ways to say thank you.  5      .You will feel good trying one of the ideas, and the person being thanked will feel good too. It’s a win-win situation.

A．Think of some ways of your own.

B．You can write a thank-you note.

C．How do you show your gratitude(感激)?

D．The best way is to go and thank him in person.

E.        Apologize if you forgot to show your thanks at the spot.

F.        That way the person can pick out a favorite book or eat out.

G.        This is not quite as personal, but it still shows your appreciation.

On Halloween, Children in costumes ask for candies ____________ shouting “ Trick or Treat”.

– Are you free after school?

-- Sorry. I’ve planned to treat a friend of mine to dinner ___ for his help.

A．in addition         B．in turn            C．in return          D．in total