When first ______ to the market,these products enjoyed great success.选项:a、introducing b、 introducedc、 introduce d、 being introduced

When first ______ to the market,these products enjoyed great success.选项:a、introducing b、 introducedc、 introduce d、 being introduced First,the interviewer asked Charles 1.______ he had gone to college.这里的答案是where,请问when或if/whether能不能填在这里? 9. When I first arrived in Japan, I was surprised ______ the way people greeted each other.A of B to C with D at The first thing for you is to find a place _The first thing for you is to find a place _______(live )in.When is the best time ________(plant )vegetable.Peter's mother is a great ______(garden). when the train ______(go)to leave robert frost was not longer young when he published 86______ his first book of pome in 1913.though born is San 87______ Francisco,he grew in a New english family which was 88______ returned to new england when he was ten.as many 89______ other writer 翻译：I wrote this when i first moved to China. when were the first black people brought to America when we met first I lost my heart to you! when did you first go to the cinema?(回答) when did you first go to the cinema? I started to like you when I first saw When ______ why he was late,he said he had missed the first bus.A.asking B.asked C.to be asked D.to ask我选的是D,为什么呢? When I first ______ (hear)the news,I______ (can not ) believe it.要原因 --__should I do first?--Peel the bananas.A.HOW B.WHAT C.WHERE D.WHEN --______?- Mary is always ______ leave the classroom.A.firstB.first student toC.the first D.the first to I want to know when we will start.改为同义句I wonder when ______ ______. She was the first one ______(be) ______(ask) to speak.