Question

4．Please call again at 10：30，__________ time the meeting should be over．（　　）

• A． to which
• B． by which
• C． from which
• D． of which

Answer 1

分析 请十点半再打电话过来，到那时会议应该就结束了．

解答 答案：B．Call me again at 10：30，by which time the meeting should be over 这是个定语从句，先行词是 10：30，which 是定语从句中的关系代词，by是到某时．其他几个介词的含义与句义不符．
这个句子还可以写成Call me again at 10：30，and by that time the meeting should be over 这就是并列句．

点评 考查介词+which的定语从句．考查介词+which 引导的非限制性定语从句，在这种定语从句介词的选择从两方面入手．1，根据先行词来判断．例如本句． 2．根据从句的动词来判断．例如，China is a country to which the island belongs．