The first recorded sighting of a transit was made, in northwest England, by Jere
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The first recorded sighting of a transit was made, in northwest England, by Jeremiah Herrocks, who had worked out a repeat on 4 December, l639．The intervals (时间上的间隔)between transits follow an unusual pattern：8 years, then 121.5, then 8, then 105.5 years, and will do so until 2984．Question：When can we see the transit of Venus next time according to the text?
A.In 2012．
B.In 2033．
C.In 2025．
D.In 2055．
试题答案
A
从文章可知整个周期需要：8+105.5+8+121.5＝243(年)，那么下一次应该是在1639年以后的四个周期之后的2012．