Question

23. Tom had to be told two or three times ________ he could remember what the teacher said. ...

23. Tom had to be told two or three times ________ he could remember what the teacher said. A．before B．when C．until D．As

Answer 1

A

23．A(解析：考查连词。before "到……为止；在……之前"when“当……时候"until"直到……为止”as“当……时候”，until强调动作的延续性，其中tell并非延续性动词，另根据句意“老师说两三遍之后汤姆才能记住。”因此选A。)