Question

We had invented many new things _________ last year.

A. by the end of    B. by the time of    C. in time of    D. last time

Answer

A

【解析】句意：到去年年底我们已经发明了许多新东西。A. by the end of到……结束时；到……时为止；在……之前；B. by the time of到……的时候；C. in time of在……的时候，在…时候；D. last time上次，最后一次。结合句意和语境可知选A。

点睛：1.by the time of：到…时候；例如，By the time of his death in 1227,Genghis Khan controlled most of northern China.( 1227在他死的时候，成吉思汗控制了中国北部大部分地区。)

2.by the time 到···为止；当···的时候，通常引导一个时间状语从句，一般用完成时态。by the time+过去式从句，主句通常用过去完成时。 例如， By the time l got to the station，the train had already gone。当我到达车站时，火车已经开走了。