Complete the following passage by using the words in the box. Each word can only be used

Complete the following passage by using the words in the box. Each word can only be used once. Note that there is one word more than you need.
A. recently      B affects      C pattern      D. varied   E. floats
F warm        G. regularly    H. mysterious   I. effect    J. evidence
Big climate changes in the last million years might have e from something very small: dust from outer space.
Earth changes between ice ages and warm periods in a(n) __【小题1】     that includes several cycles, including a     【小题2】_ one that lasts 100,000 years. Scientists     【小题3】    suggested this cycle might be due to changes in the inflow of cosmic(宇宙) dust.
The idea is that Earth _【小题4】    above and below the imaginary plane that runs through the sun and Jupiter(木星), pleting a cycle every 100,000 years. So maybe it encounters     【小题5】_varying amounts of dust during each cycle that produce the climate trend.
Now there is some __【小题6】    , from ancient cosmic dust recovered in ocean-floor drilling near the Azores islands west of Portugal. The large quantity of the dust rises and falls with a wonderful 100,000 year cycle during the period analyzed, 253,000 years to 458,000 years ago. Periods of more dust are related to    【小题7】__ climates.
But that is a long way from showing that the dust __【小题8】__ climate. Some scientists argue that it is not clear how cosmic dust would make the climate warmer while dust from volcanoes is known to make it cooler. They say the cosmic dust is so thin that it is hard to see how it could have any climate__【小题9】    .
Nevertheless, the new study shows scientists have to take the cosmic dust idea seriously.C