I believe I would be a valuable addition to your team. My English is at     1     and I have travelled to several English-speaking countries. I have also helped to organize a three-day tour of my city for     2    .

Avatars are the d    1     identities that people use online to communicate and express themselves. When the first simple 2D avatars appeared in the 1980s, very few people knew that future avatars would have such     2     forms and uses. People can make their online images different from their real selves by dressing their avatars in f    3     clothes. And people usually have more than one avatar, such as a s    4     one for work. Of course, the avatar you choose says a lot about your p    5    . While most people create avatars that have similar features to them, they also o    6     make their avatars look better than they do in real life. Nowadays, people choose an avatar from a selection of r    7     images, or create their own images. The use of avatars has also caused a few c    8    . Some users worry that spending too much time in v    9     worlds makes them afraid of meeting people in the real world. However, other users view avatars     10    .

Image waking up one morning    1     the option of staying in bed and     2     a button to send a robot to do all the work for you. How cool that would be! It may seem like building    3    in the air, but given the rate at     4     artificial intelligence, or AI, is being developed, in the future such dreams may actually come    5    .

In general, doctors in those days had two    1     theories to explain how cholera spread. One theory was that bad air caused the disease. The other was that cholera was caused by an    2     from germs in food or water. Snow    3     to the second theory.

Jo has been dying to get a p    1    from home because she has been in the s    2    school with clay floor and roofs of grass for a month. When she reaches the school ground, she is greeted by a     3     of “good morning” from the students. Science is the most challenging subject as students     4     of doing experiment. The other day, Jo was showing the boys the chemistry experiment when the mixture was bubbling over everywhere and the boys started jumping out of the windows. Sometimes she wonders how r    5    the chemistry is to these students—few will ever become chemists.

Last weekend, Jo and Jenny visited Tombe’s home, a low, round bamboo hut with grass     6     (stick) out of the roof, where they could only see a few     7    , including one broom, a few saucers, a kettle, cups and a couple of jars. For dinner, they 1    8    stones on fire to heat and placed the hot stones with ingredients to steam. They used a can standing u    9    on the grill over the fire to dry out the leftover food in case leftovers attracted bad spirits. It was such a p    10    to have spent a day with Tombe’s family.