单项选择题
Michael Creuse, ______ help Whymper climbed the Matterhom, was one of the first of the professional guides.( )
单项选择题 No sooner ______ than it began to rain. ( )
单项选择题 I remember he's written a book ______ I've completely forgotten. ( )
单项选择题 I can't thank you ______ much for your kindness, because without your help I can't have succeeded in the exam. ( )
