互動封閉仿真課堂
1、智能交互 2、電子板書式視頻教學(xué) 3、在線互動問答 4、封閉課堂啟發(fā)式教學(xué)方式
隨堂測試、知識梳理、易錯點揭示、總結(jié)啟迪智能錯題本
聽課中的錯題能自動加入錯題本,課后可方便復(fù)習(xí)及導(dǎo)出錯題本升級服務(wù)
在線答疑、課后同類題練習(xí)、講義下載、短信提醒原則六、-ing形式或to do可作主語或賓語,-ed形式則不可以
例11. ___________ in a heavy traffic jam is quite an unpleasant experience.
A. Caught B. Having caught C. Being caught D. To catch
解析:本題中is為系動詞,前面應(yīng)該作主語,用-ing形式,所以答案為C。
例12 ___twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city.
A. Examining B. Examined C. Being examined D. Having been examined
解析:本題中is為系動詞,前面應(yīng)該作主語,用-ing形式,所以答案為C。