【正文】
o...? seen...? tried...? ... Singapore Things you know Things you want to know 2a It’s in Beijing and is also called the Forbidden City. Section B 1a— 2e Unit 9 Have you ever been to a museum? It’s the longest wall in the world. It’s in Xi’an, Shaanxi and was built in the Qin Dynasty. thousands of 數(shù)以千計的,許許多多的 So far, they have planted thousands of trees. 到目前為止,他們已經(jīng)栽了數(shù)以千棵樹了。 如: three thousand 三千