He _______ when the teacher came in.A sang B was singing C will sing

Does he know _______?A.when open the library is B.when the library is open when did he buy the computer ______ ______ has he _______ the computer When he goes to the teachers’ office,he always feel _________(relax) or _______(stress). When he looked _____ at the picture ,he looked _______(sadly)为什么， When he woke up,he heard the _______ of knocking at the door.A voice B noise C sound When his teacher came into the classroom ,he happened _______(sleep)soundly. Jim has been in the factory for two years _______ he left school.A.when B. He _______ when the teacher came in.A sang B was singing C will sing The problem is _______ he is too tired.A.which B.when C.what D.that He stopped _______ TV when the dinner was ready.watching to watch watch He stopped _______ TV when the dinner was ready. A watching B to watch C watch He _______ when the teacher came in.A was singing B sang C will sing He is the teacher _______ son we all likeA.when B.why C.who D.whom The boy _______ (想成为一名宇航员）when he grows up! 英语翻译_______ _______ _______ he live _______ the bus station _______ the students' homework,the teacher found a lot of mistakes.A.When he was correcting C.When he corrected C.Correcting D.all the above He was _______ right when he turned off the gas at that moment1 exactly 2 absolutely 3 precisely 4 increasingly He sang just now.(用when I came here 改写句子） He _______ ________ when I came hereHe cleaned the blackboard yesterday.(用at this time yesterday代替yesterday)He ______ _______ the blackboard at this time yesterday