1 . Directions: Fill in each blank with a proper word chosen from the box. Each word can be used only once. Note that there is one word more than you need.

A. form        B. mineral        C. hardens        D. surrounded        E. primarily        F. trap G. wore        H. integrated        I. piles        J. perfectly        K. surface

Natural Domes

A dome is a curved formation or structure. It is shaped like half of a sphere. Imagine cutting an orange in half, and placing it cut-side-down on a table. This is the shape of a dome, although most domes in nature are not     1     rounded.

Some natural domes develop when magma(岩浆)from deep within the Earth pushes up    2     rock layers. This type of geologic dome can     3     as magma intrudes between two layers of sedimentary rock. The magma creates a dome or triangle shape as it pushes the other layers apart. The hardened magma that forms this type of dome is called “laccolith”.

Lava domes form as magma     4     atop volcanic vents(火山口). In the Chaitn Volcano in Chile, an ongoing eruption that began in 2008 is forming a lava dome next to another one that filled the crater when the volcano erupted 9, 400 years ago.

Another kind of natural dome is shaped    5     by weathering and erosion, which cause curved sheets of rock to separate from a large rock mass. The Cima Dome in the MojaveDesert, in the U. S. state of California, was once a mountain. Over time, weathering and erosion     6     away the mountain and smoothed it into a rounded dome.

Salt domes result when rock salt rises through overlying sedimentary rock. Salt    7     up as ancient seas dry up over time. Eventually, sediments form over this layer of salt. Salt is less dense than most other rocks, and it slowly moves upward toward the surface, forming a dome-shaped hill. One of the most famous salt domes is Avery Island, in the U. S. state of Louisiana. Avery Island is a salt dome     8     by low-lying swamps(沼泽地)of the Mississippi River delta. Eventually, these salt domes can break through the surface rock layers. Actually, salt domes are important sites for industry. Salt is a valuable     9     used in the production of plastics, pesticides, preservatives, and fire extinguishing equipment. Moreover, Salt domes     10     oil between layers of rock so that oil wells can drill into it and extract oil.

2 . Complete the sentences using the past participles of the verbs as the attribute or the object complement.

repair     cut     excite     raise     open     position     prepare     style     surround

1. They finally got that broken vase in the National Museum Collection ________ by a team of relic restorers.
2. The director got the actors ________ so that everyone could fit into the picture.
3. Do you know how long a(n) ________ jar of peanut butter can stay fresh?
4. This is a well-written book which lists the things to do if one wants to get people ________ about his research.
5. Claire went to the hairdresser’s and had her hair ________ and ________ before the piano performance.
6. At the foot of the hill was a mysterious little hut ________ by tall pine trees.
7. Mr Clark put the honey ________ for the picnic into his basket.
8. These are the cattle ________ on a special diet which can produce high-quality milk.

3 . 选词填空

permit；declare；responsibility；scientific；survival； moral；beneficial；electric；indicate；surround

1. A good diet is_________ to health.
2. His only chance of ________ was a heart transplant.
3. She would not ________ herself to look at them.
4. He came along to lend me ________ support.
5. Do you have anything to ________?
6. There's an ________ heater in the bedroom.
7. We need to be more ________ about this problem.
8. Early results ________ that the government will be returned to power.
9. That is the question that will always ________ him.
10. The bank refuses to accept ________ for the mistake.