My train arrives in Beijing at eight o’clock tonight. The plane I would like to take from

问题补充：

My train arrives in Beijing at eight o’clock tonight. The plane I would like to take from there by then.

A. has left

B. will have left

C. will leave

D. had left

答案：

A. has left

(答案→)B. will have left

C. will leave

D. had left

解析：考查时态。本题的关键词是by，该词常常与完成时连用，如果后接过去的时间，就用过去完成时；如果后面接现在的时间，就使用现在完成时；如果后面接将来的时间，就使用将来完成时。句意：到今晚八点我要乘坐的飞机将已经起飞离开了。本句中的then就是指今晚八点，这是一个将来的时间，所以与将来时完成时连用。故B正确。