Sneezing is a self-protection of our body. When foreign matter such as smoke or dust en-ters the nose, our body does     1     it needs to do to clear the nose—it causes a sneeze. A sneeze is one of our body's first defenses     2     bacteria and viruses.

However, sneezing can be bothersome, especially if you find       3     (your) running through a box of tissues every allergy season. However, sneezing is     4     (rare) a sign of a serious problem.

Some people with specific conditions may experience       5     (addition) symptoms (症状) if they sneeze too much. For example, people with a headache may experience other discomfort if a sneeze       6     (occur).

Not every person will respond to allergens     7     same as people around them. If you don't sneeze after stepping into a dusty room or       8     (take) a deep breath from a bunch of roses, don't worry. Some people s noses aren't as sensitive.

If you begin frequently sneezing and cannot find out any obvious cause, make an appointment     9     (see) your doctor. While a few sneezes may not be an indication of anything worrisome, it's always       10     (good) to talk about your new symptoms and look for a potential issue than suffer frequent sneezing.

4 . Today is my last day volunteering at the Sustainable Community Development project in Cambodia. It's time to _________ and say goodbye to everyone I met and this beautiful country. I spent five weeks here and _________ fell in love with the country, the experience, and especially the _________ at school.

In the beginning, I was a bit _________ since I am not a teacher and _________ is not my mother language. There were two teachers and one _________ in every class. The translator, called Vaung, was very _________ and willing to help us to _________ the kids when they did not understand what we were saying. We used to _________ the classes in advance. In fact, all the __________ were very good. The kids were happy and they would understand and appreciate, at all times, that we were doing volunteering work. They looked like they __________ to learn English well.

In the same __________ , the kids had different levels of English. There were kids that would __________ us while others that would just repeat anything we would say. So we had six different classes: in five of them we __________ basic English and in the sixth one we could teach English that was a bit more __________ to kids with a higher level of English. The kids would forget many things they learnt the previous day, so we would need to repeat a lot and be very __________. However, we did get to know them very well. We spent hours playing with them and trying to improve their English skills. From the first day there were always free smiles and hugs on hand!

In short, it has been the best __________ of my life! Before the trip, I did not know what exactly to __________from the program, but it was a complete surprise. I __________ this program to any person that expects to give __________.