C. Players may be rewarded with delicious food.

　　D. Players can start the game at any time they want.

20. A. Add variety to the recommended game.

　　B. Look around to find a cheaper online game.

　　C. Persuade the woman to change her mind.

　　D. Try to find an extraordinary online game.

II. Grammar and Vocabulary

Section A

Directions: After reading the passage below, fill in the blanks to make the passage coherent and grammatically correct. For the blanks with a given word, fill in each with the proper form of the given word; for the other blanks, use one word that best fits each blank.

A newly discovered tea plant is caffeine-free

The world loves tea and some 3m tons of tea are consumed every year. Tea can be good for health, as it contains compounds that help to lower cholesterol（胆固醇）and reduce the risk of heart disease. But there is a downside. Tea contains caffeine which, (21) __________ it improves mental alertness, can also cause anxiety, insomnia and other problems.

(22) __________ would be agreeable is that a tea plant that provides all the taste