3. GWD32-Q3

using the mirrors left on the lunar surface by the Apollo missions, mirrors

allowing the Earth –Moon distance to be measured precisely by lasers, it

has been determined by scientists that the moon is moving from the Earth

at the almost imperceptible rate of thte3e to four centimeters per year .

1)     allowing the Earth -Moon distance to be measured precisely by lasers

.it has been determined by scientists that the moon is moving

2)     allowing that the Earth-moon distance can be measured precisely

lasers, scientists have been able to determine that the moon is moving

3)  that allow the Earth-Moon distance to be measured precisely by lasers ,it was determined byscientists that the

lasers ,it was determined by scientists that the Moon is moving away

4)     that allow that the Earth-Moon distance can be measured pre3cisely by

    lasers , scientisls were able to determine that the moon is moving away

题目好像有点不完整，虽然做对了，但是有点模糊。

选2）

根据现在分词的逻辑主语 排除1/3

在2与4中挣扎，我判断的依据是away与from构成redundant.

另外 完成时感觉也比较好一点（讲不清具体是什么 请nn解释谢谢）

ALLOWING确实要比THAT ALLOW简洁一点，但也不是不能用，我觉得move一定要加

上away方位副词才是偏离开的意思，不然MOVE要往哪里移呢？

同意楼上的理解，这个away我觉得很重要的。原文的意思就是说月球正在偏离地球。

我觉得缺少的那个可能是正确的。选项2和4的can好像特别累赘呢。

scientists have been able.... the moon is moving

 scientisls were able....... the moon is moving  不搭配