海量資源,盡在掌握
 (an用在以元音音素開始的詞前)art. 一,一個:There is a book on the desk. 書桌上有一本書。art.任何一個,每一:We covered the distance at a speed of 60 miles an hour.我們以每小時60英里的速度走過了那段路程。......(本文共 132 字) [閱讀本文] >>