Who did the teacher_______the letter for the whole class?A has write B has written C have write D having written为什么选C?谢谢帮我分析!

用介词填空.1.Who is _duty today?2.What class are you_?3.His father is a teacher_ No.4 Middle School.4.Look!Who is the boy _the picture.5.Welcome_ China,Mr.Green. Who did you go to the movie____? Who did you consider____(cook) the meal. Who did you lose the match who did the thief steal from? Who ____(赢) the game.Bob did. Who did the piece for the best performer go to? The teacher_(like)_(dance).用动词的适当形式填空. 连词成句:you,the,did,party,meet,who,at(?) tina was the only one who did not eat pizza? who did you buy the present for for___(l) Who did Li Ming visit the next day的意思 who wanted to sell the house.能改成who did want sell the house吗 who answered the telephone.能否换成who did answer the telephone who taught和who did teach有何区别him a few words of italian?The waiter.A.who taught B.who did teach who did you think ____________(control)the factory last year?my father did 当他走进教室时,老师已经开始教学了.By the time he_ _the classroom ,the teacher_ _teaching already Daming visited the museum last Sunday.对Daming提问.是Who did visit还是who visited?