by the time he reached the dentist ,the pain in his tooth ____A stopped B had stopped C has stoppeD has been stopped 选择哪个?为什么?不是现在完成的被动吗？疼痛不是被止吗？

He sent the letter by air mail _____ it might reach them in good time.A.because B.so as toC.so that D.for I am tired,i__(paint) the living room aii dayby the end of next week,they__(reach) the place.by the time he ___(arrive),we will already have left california填空,救助,还有 all day 用什么时态. when did your father____shanghai?last night.___i got to the airport,he had left.A.arrive at.when B.get to,by the time C.reach to,by the time D.before2.____you ever_____late for class?yes.why____you late?A.have,been,have been B.DId,be,were C.Have,been 动词填空：She ( ) by the time he got back.(go ) By the time that we got there,he was out. he tried to keep the fire out of his room to give the fireman time to reach him. 翻译By the time he comes,I'll have left.( By the time he came,I had left.) by the time he returns,the project probably ____ahead of time by the time ,by then She had gone by the time he got back 其中的by the time 能用when 或while替换吗 By the time by the time by the time you came back,we (complete)the work by the time he comes back,we (complete)the workby the time you came back，we (complete)the workby the time he comes back,(complete)the work 题目是这样的：by the time he was ten ,he ( ) very well . Just then,he heard short,quick steps closely behind him.By the time he reache By the time he got to the airport,the plane had taken off.改为一般疑问句 By the time he reached the other side of the bridge He left at ten.（by the time I got there作时间状语改写句子） He ____ ____ by the time I got there