40．The boy dived into the water and after _________________________ (好像很长时间), he came up again. (what; seem)

39．Not until we watched the Earth Day program on TV ________________ (我们了解) much about global warming.　 (learn)

38．He __________________ (一定完成了) his work; otherwise he wouldn’t be enjoying himself by the seaside.　 (complete)

37．Occasionally she tried to argue with her husband, __________________ (结果) crying her eyes out.　 (end)