1 . What if we had the power to control time, instead of moving from the past to the present to the future? What if we could jump, loop and travel through time in a machine?     1    

This ability would allow us to witness historic wonders, change decisions and see people from the past.     2    

The mysterious puzzle of time has kept people debating its nature for hundreds of years. Science fiction writers have turned it into imaginative stories. Some scientists have even attempted to explain it using math. This myth tries to make the dream of time travel come true.

    3     He called it “spacetime”. Einstein said that there are three dimensions in space: height, width and depth. A scientist named Hermann Minkowski added time as a fourth dimension.

Einstein introduced two ideas that have led to theories about the possibility of time travel. The first is relativity. The idea of relativity is that the force of gravity causes space to bend, which causes time to twist.     4    The idea is that a traveler moving super-fast through flat spacetime will enter the future. Einstein considered time “relative” because it is measured based on where we are on Earth or in space.

Stephen Hawking is a famous scientist. He believes that a time machine will never be built. If it were possible, he thinks we would already know. If a time machine could be built, how come no one from the future has invaded us?

The first science fiction story with this theme is The Clock That Went Backward by Edward P. Mitchell, which was published in 1881.     5    , in which some tools such as phones, watches, photographs and old books take travelers backward and forward.

Will time travel ever happen? Who knows? Most important is to keep your eyes open and have a sense of wonder.

3 . My sense of direction is pretty horrific and there was one time I was in a very remote part of Austria and wanted to go to meet up with some of my friends at a lake. I grabbed a bike, and set off, map in hand. All was going well until I realized I was in a really, really remote part of the town, and pretty soon I realized I was also on a hill. My poor sense of direction and my childish relationship with maps accidentally led me up a mountain.

I was 2.5 hours into my voyage, there was no sign of any life around me, there was definitely no lake in sight at all and especially the noises around me got stranger. I looked at my map wondering how it could deceive me and where our relationship took a wrong turn. Then, I turned around and BOOM, I got a flat tire. It was getting darker, I was shitting bricks by the second, and any moment now, something was going to jump out and ate me alive.

I eventually stop caring that my bike will collapse on me and start riding it down a very rocky trail at a pretty fast pace just hoping to get out of there as fast as possible.

Several minutes later, I finally see a highway, so I get back on a known trail and just a few kilometres up, I see the sign where I missed my turn for the lake. After my 2-hour detour, I had no desire to be near anything wet as I was already soaked from exhaustion, so I tried to get reception to call and see if anyone could pick me up. Eventually, I was able to track down some elderly Austrian men who could see my dilemma and handed me their phone, and a large pint of Austrian beer to save the day.

The early 1400s was a     1     (glory) era in Chinese history. During this time, the Yongle Emperor wanted to develop     2     (harmony) relations with the overseas neighbours. Zheng He, one of the most influential     3     (explore), took charge of the task. One of the states mentioned in the historical records was Boni (present-day Brunei),     4    small kingdom in South-East Asia. There is proof     5     China established very good relations with this state a long time ago: one of its kings was buried in Nanjing during the early Ming Dynasty, and there is a fascinating legend about the king

In 1405, on behalf of the emperor, Zheng He sailed the oceans on his first voyage. His fleet was loaded with gifts to the     6     (neighbor) countries and regions. In 1407, he travelled to Boni, which strengthened the friendly relationship between the two countries. In the subsequent year, the King of Boni paid a friendly visit to China. He     7     (accompany) by more than 150 people. The records show that the visitors were astonished by     8     rich and     9     (technology) advanced the Ming Dynasty was. They received a royal welcome     10     the Yongle Emperor.