It was an astonishing story .这个句子是什么结构的句子?为什么astonish是ing形式

It was an (o ) activity it was an exciting finish 怎么翻译? Was it an interesting trip?Why?意思 It was an unforgettable experience.[英译汉】 It was an interesitng 这种说法对吗? such an informative lecture was it 还是such an informative lecture it was it was exciting news for all the people 为什么是it was exciting而不是it was an exciting? it was an easy mistake to make it was on to make It was quite an easy question.还是 It was a quite easy question. 一般说It is an accident 还是It was an accident? All in all,it was an e______ day. it was _ great surpriseA /B aC theD an 将it was an exciting week变为感叹句(2种) It seemed as if the world was at an end! It was an exciting running race.改成一般疑问句 What __________the game?It was really an _______one. We got lost in London.It was quite an a___. it was an.后面为什么加动词过去式