1 . Victoria Falls is one of the Seven Natural Wonders of the World. Statistically speaking, it is the largest waterfall in the world. Victoria Falls is located on the border between Zambia and Zimbabwe. The falls are also close to the border of Botswana. The Zambezi River, which originates in northern Zambia, serves as the falls’ water source.

There are basically two seasons for the Victoria Falls area. The rainy season runs from late November to early April with the remaining months accounting for the dry season. One would imagine that the rainy season with more water would make the falls more spectacular (壮观的), however, the additional water and subsequent mist(水汽) in the air makes it nearly impossible to see the base of the falls.

The months of June and July are probably the best time to view the falls. The water levels are still high enough to show the beauty of the falls, but the amount of water is less, creating less mist and more visibility of the falls.

As you move into the later part of the dry season, August through October, it is quite possible that you will see more rock face than falls. However, this also opens the door for walking across the top of the falls, which can be a unique and exhilarating experience as well.

During the rainy season and high water, Victoria Falls can be a challenge to capture (抓拍) with a camera because of all of the mist in the air. However, this increases the probabilities that you will be able to capture rainbow images around the falls.

The lower water levels can create more dramatic pictures with various rocks cropping out between the falls. You should also be able to see the canyon and base of the falls. You will also be able to walk across the top of the falls and take images down the face of the falls.

1. Where does the water source of Victoria Falls originate?

A．In northern Zambia.	B．In southern Zimbabwe.
C．At the border of Botswana.	D．Between the border of Zambia and Zimbabwe.

2. When is the best time for travelers to walk across the top of the falls?

A．From November to April.	B．From August to October.
C．In the months of June and July.	D．In the months of May and June.

3. What does the underlined word “this” in paragraph 5 probably refer to?

A．A camera.	B．High water.
C．The rainy season.	D．All of the mist in the air.

4. What are the last two paragraphs mainly about?

A．Travel strategies at different water levels.	B．Challenges for falls travelers to overcome.
C．Photo opportunities in different seasons.	D．Different views of the falls all the year round.