He came back home in April,by which time his grandfather ___

He came back home in April,by which time his grandfather ___ ,一道填空是这样的 he came back late,（by） which time all the guests h he came back home,sick ___ he ___(go) back home in two hours? Had they g_____ up by the time I came back home? we left after he came back home He did not go to sleep until his mother came back home同义名句 句型转换 1 He was watching TV when his mother came back home fro on a ___ morning , he came back home. A:rain B:rainy C:rains by which time ,in which time 区别 英语问题：在特定的情景中,为什么by which time可以改成by the time when he came ba although in his eighties,my grandfather is still ___.He alwa