题目内容：

This is the most exciting kayaking expedition（皮划艇探险）possible for beginner kayakers. You can expect to experience a whole range of different conditions and scenery. This expedition is a total of 8. 27 km in distance and it actually enters the streams in the North of Ubin and exits in the South.

Three and a half kilometers of pure mangroves（红树林）, makes this the longest pure mangrove kayaking expedition in Singapore. The distance spent inside the mangrove gives you the maximum opportunity to witness wildlife within the mangrove ecosystem. Come experience the challenge of operating your kayak through the labyrinth（迷宫）of waterways and be amazed at the calm and quiet beauty of the wetlands. This last corner of natural wilderness in Singapore is so inaccessible, that very, very few have ever experienced it－which makes this a truly special program.

Most Recent Traveler Reviews

Traveler A: Traveled from bottom to top of Singapore in rush hour traffic in order to get to Ubin for a 9:30 start—only to find no guide there. Although, once he arrived, the guide was lovely—offering a very knowledgeable tour and lots of enthusiasm around a beautiful part of the world—our 6-hour kayaking trip was actually over before 2:30 pm, despite only hitting the water at 12 noon.

Traveler B: The guides were nice, however the biggest disappointment was the timing. We thought we were going for a 4-hour kayak but were back in 2 hours and that included the prekayak safety talk. The mangroves are lovely but we were told that a storm was near. We felt that there had never been any intention of going out for longer.

1.What is special about the kayaking trip for travelers is that they ______.

A. have a good relaxation by kayaking

B. feel the challenge of kayaking

C. enjoy the beauty of the wetlands

D. experience the wonder of mangroves

2.Which of the following information is TRUE about the kayaking expedition?

A. The time, distance and cost are referred to.

B. The kayaking trip starts at 9:30 am and ends at noon.

C. The distance spent inside the mangrove is 3.5 kilometres.

D. The mangrove wetlands of Ubin lie in the south of Singapore.

3.Which is the common point referred to by the two travelers?

A. The unpleasant weather.    B. The shortened distance.

C. The lovely wildlife.    D. The guide’s service.

4.What can we learn from the passage?

A. The safety of the kayaking travelers is not well guaranteed.

B. The eco-system of Ubin nature reserve is well protected.

C. The timing of the kayaking trip is satisfactory on the whole.

D. Travelers’ complaints may not be considered by the traveling company.