B3R1

​3D Printing:

Imagination Is the Only Limit​

Imagine a printer (which is) capable of creating three-dimensional objects, such as (like) artificial limbs, coral reefs, and even buildings. Many might consider it ridiculous to dream of such machines (L1 SP). But with 3-D printing, which makes use of computer designs and layers of material to create countless useful objects, it’s already a reality.

Multiple Choice

我在日本工作的哥哥剛回來

(我只有一個哥哥)

• My brother, who works in Japan, just came back.

• My brother who works in Japan just came back.

When Alex Pring was born in Florida without most of his right arm, it seemed that (L1) he would never be like other boys. However, Alex’s life changed when engineering students at a university in the US collaborated to give him a hand (pun). They developed a plastic, electronic arm (which was) equipped with a sensor that would enable Alex to open and close his hand by slightly flexing his biceps muscle.

​3-D-Printed Limbs: Body Parts That Don’t Cost an Arm and a Leg (pun)

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Now, Alex can use both arms to hug his parents. Thanks to 3-D printing technology, artificial limbs can be produced relatively cheaply, which promises to benefit those (people) like Alex in ways that they never dreamed possible.

​3-D-Printed Limbs: Body Parts That Don’t Cost an Arm and a Leg

​Sea temperatures have risen to an alarming degree because of global warming. Many creatures underneath the surface have suffered as a result, especially due to the decrease (n.) in coral reefs. These frail and precious underwater structures are home to many sea creatures. If the reefs continue to disappear, the balance of many ecosystems might be destroyed forever.

​Man-Made Reefs: 3-D Under the Sea

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rise (vi)	rise-rose-risen	上升；起立	The sun rises. / Rise and shine. Rise up to one's feet. (L1) / All rise!
raise (vt)	raise-raised-raised	提起、舉起； 養育； 募款	raise your hand/ raise your glass/ raise your voice. He was born and raised in the US. raise money/funds
arise (vi)	arise-arose-arisen	（問題）產生	A crisis, war, difficultie, conflict, problem arises
arouse (vt)	arouse-aroused-aroused	激起、喚起(情緒)	arouse interest, jealousy, curiosity, suspicion, concerns, etc.

Multiple Choice

? your glass and toast.

• Rise

• Raise

• Arise

• Arouse

Multiple Choice

A while later, it appeared that he was getting drowsy, so I ? to my feet to get ready to leave.

• rose

• raise

• arose

• aroused

​To help protect sea creatures’ habitats, a project relying (=that relies) on 3-D printing has been launched to create artificial coral reefs in the Caribbean. These reefs are designed to closely match (v.) natural reefs in texture and structure. If 3-D-printed reefs can consistently succeed in attracting sea creatures, it appears that (L1) they could (表可能性，非過去式) help (to) save valuable underwater ecosystems.

​Man-Made Reefs: 3-D Under the Sea

Erecting new buildings often requires a tremendous amount of labor and time [不可數N]. In order to reduce costs and speed up construction, experts in Dubai created the “Office of the Future,” the world’s first stable and reliable 3-D-printed office building in 2016. According to reports, it took a huge 3-D printer just seventeen days to print all the parts for the 250-square-meter building and (it) took workers only two days to assemble these individual concrete pieces.

​Building a Brighter Future: The 3-D-Printed Cities of Tomorrow

Multiple Choice

It ? me 3 days to read this novel.

• spent

• cost

• took

Multiple Choice

Sarah ? 3 days reading this novel.

• spent

• cost

• took

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Unique and modern-looking, this building required only half the labor and just a tenth of the time. This has prompted Dubai to use innovative 3-D printing technology in the future. By 2030, 25% of its buildings will be constructed in this way.

​Building a Brighter Future: The 3-D-Printed Cities of Tomorrow

Multiple Choice

1/2 + 1/3 =

• five sixth

• fifth six

• fifths six

• five sixths

​Clearly, 3-D printing can be tremendously beneficial to humankind and to the planet in numerous ways. To ensure positive change, we simply need to build on the technology (we already have) and map out a blueprint for the future. Just imagine!

​Building a Brighter Future: The 3-D-Printed Cities of Tomorrow