A
Tanni was born（1）

with

with

an illness，which made her unable to move her muscles normally.Tanni was interested in sports，but when she（2）

was growing

was growing

（grow） up she didn't see many disabled athletes on television.Then several years later，while watching the London wheelchair marathon，she saw an athlete she knew.She dreamed that she would be on the starting line，（3）

competing

competing

（compete） in the marathon too.Finally her dream came true.She was not only on the starting line，but also the winner at the finish line.Tanni believes you'll never know what you can do （4）

unless

unless

you try. B When travelling abroad，we are expected to respect the social customs of the places we visit.In conservative countries，for example，wearing appropriate clothes is a way of showing we are（5）

respectful

respectful

（respect） and open-minded.Even if we are behind the walls of a hotel the entire time，the staff are locals，and should（6）

be treated

be treated

（treat） accordingly.Remember we are guests in their home，and while we（7）

have visited

have visited

（visit） foreign lands many times with this in mind，we still fall short occasionally.
C In the early days of space travel，scientists sent animals into space to learn about the conditions humans might face.By studying animals，they were able to understand（8）

what

what

it was like to live without Earth's gravity and atmosphere.The animals were used to test specially （9）

designed

designed

（design） equipment that would later be used for human space flight.Animals（10）

that/which

that/which

survived a space flight provided information about how weightlessness would affect humans，what spaceship designs would be the safest，and how well a spacesuit would work.