书籍 Solutions - 基础 - 单元2 - 2F

an area of land that has remained largely undisturbed by humans and their modern development

a type of small vehicle that is used to travel on water

a structure built over a river, road, etc. that enables people or vehicles to go from one side to the other

a tropical forest with many plants growing densely

a very tall and large natural structure that looks like a huge hill with a pointed top that is often covered in snow

a way or track that is built or made by people walking over the same ground

a natural and continuous stream of water flowing on the land to the sea, a lake, or another river

a long, flexible cord made by twisting together strands of fibers, wire, or other material, used for tying, pulling, or supporting things

a low area of land between mountains or hills, often with a river flowing through it

in what manner or in what way

used to talk or ask about the number of things or people that are involved or concerned

used in questions to ask for information or for someone’s opinion

in what place, situation, or position

used to ask or talk about one or more members of a group of things or people, when we are not sure about it or about them

used in questions to ask about the name or identity of one person or several people

used for asking the purpose of or reason for something