在靠近桌面边沿的地方放一枚硬币，在硬币前架一个约2 cm高的栏杆，在硬币上方沿着与桌面平行的方向用力吹一口气，硬币就能跳过栏杆，这是因为（  )

补全对话

从方框中选择最佳选项完成对话, 有两项多余

a. I'm cleaning the house.

b. Is your mother making dumplings with her?

c. What about your father?

d. Yes, we are.

e. She is buying some food in the shop.

f. What's your mother doing?

g. They are making cards for their family and teachers.

Daming: Hi, Tony! Are you getting ready for Spring Festival?

Tony:____ 

Daming: What are the girls doing?

Tony:____

Daming:Sounds great(听起来很好)! Where is your mother?

Tony:____

Daming: What are you doing?

Tony:____

Daming: How hard you are working! And is your sister helping you?

Tony: No, she isn't. She is shopping with my mother.

Daming:____

Tony: Look! He's painting the door there.

    Tahiti is the largest island of the French Polynesia in South Pacific. It covers 1,045 km and has a population of 183,600.The weather there is neither too hot nor too cold. It's always warm and humid.
    Tahitian people are very friendly and welcoming. They welcome visitors with music, dance and flowers. The  Tiare Tahiti flower, which can only be found in Tahiti, is used for greeting arriving visitors and returning family, It's popular for women and men to wear the flowers behind their left ears.
    In Tahiti, there are always a lot of things to do and to see. Around the island are hundreds of places perfect for diving. In the waters, you can meet all kinds of colorful fish and many other living things that you can’t name. Feeding sharks is another exciting popular activity. You can stand in the water behind a safe rope to watch a shark trainer hand—feed the sharks, or enjoy this fantastic scene from the boat. If you want to find a place to swim, have a sun bath or admire the beautiful sunset, Pointe Venus Lighthouse, a black sand beach, is a great choice.
    In the evening ,you can have Tahitian food, Chinese food and French—style dishes at To'ata, a square with many small restaurants. All kinds of fruit juice from coconut milk to pineapple juice can be found everywhere. Some hotels in Tahiti are built above the waters. Beautiful fish swimming below can be seen through the glass floor or coffee table. They are really wonderful places to relax and refresh you.
    Tahiti, an amazing place to do everything or nothing at all, is waiting for you.