025.
Attention please, ladies and gentlemen. Our bus is getting close to Cambridge, where we'll be stopping to eat. We'll have our lunch in the garden of a restaurant overlooking a small park that reminds people of a very famous tree. It's said that General George Washington took command of the army in 1775 under its very branches. It was almost 100 years later, in 1864, that the city of Cambridge celebrated the event and from that moment on, the tree was called the Washington Elm. Later the tree was attacked by insects and were counted to find out how old the tree was. Well, it seems that if Washington had accepted the command of his army under this tree, he must have done so on his knees. This particular elm couldn't have been over 3 or 4 years old in 1775. It is a well-known fact that Washington took command under an elm tree, but unfortunately it couldn't have been the famous Washington Elm.
Well, enjoy your lunch. Watch your step as you leave the bus.

答案解析：
(1) 正確答案為B。根據ladies and gentlemen.女士們先生們；以及Our bus is getting close to Cambridge我們馬上就要抵達劍橋了。可知，說話者為導游，因此B項正確。
(2) 正確答案為A。根據overlooking a small park that reminds people of a very famous tree. 俯瞰這座小公園會使人想起一棵非常著名的樹。可知，說話者主要介紹了一棵有名的樹，因此A項正確。
(3) 正確答案為C。根據如果華盛頓在這棵樹下接受了他的軍隊的司令(職務)，他必定是跪著完成的。可知，華盛頓不可能是在樹下接受的職務，因此C項正確。
(4) 正確答案為A。根據the tree was attacked by insects這棵樹遭遇了昆蟲的襲擊，因此A項正確。