It is expected that by 2049 the population of the city () two mi

It is expected that by 2049 the population of the city () two million.
A、would reach
B、will have reached
C、will be reaching
D、would have been reached
【正确答案】：B
【题目解析】：句意：到2049年，该市的人口预计达到200万“by+将来的时间”作状语时，句子应用将来完成时态，表示在将来某一时间以前已经完成成一直持续的动作。故选B。