过去完成时,适当形式填空 1.I———（not,hear）from my aunt since she went to japan last year.
2.what____you____(do) when the teacher came in
3.根据汉语完成句子.我到那儿时比赛已进行乐半个小时.The match ______ ________ ______for half an hour when I got there.
4.杰克以前上学从未迟到过。Jack＿＿never＿＿＿　　　＿＿＿＿for　school　　before．