KET 在線
模擬測試
小程序在線模擬測試
PET 真實
考場模擬
OPFUN Talk萌課堂,專注青少在線語言啟蒙!——寰宇咨詢中心資訊網(wǎng)
上海 18761612306
As, when和while兩者都是連詞,但在某些前提下,三者也會有一點區(qū)別。 As, when or while 我們可以用as, when和while來表示“當...同時發(fā)生的兩個事件: Another family arrived as we were leaving. When my father was out working
網(wǎng)站導(dǎo)航
熱點關(guān)注