Nearly two tons of nuclear-reactor fuel have already been put into orbit around the Earth, and the chances of a collision involving such material increase greatly as the amount of both space debris and satellites continue to rise.
as the amount of both space debris and satellites continue to rise
as the rise continues in both the amount of satellites and space debris
as the amount of space debris and the number of satellites continue to rise
with the continually increasing amount of space debris and the number of satellites
with the amount of space debris continuing to increase along with the number of satellites
d选项错在它的状语重心space debris & satellites所以就相当于伴随着这两个东西,那就不对了,而c选项是因为一整件事情。
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