A. allowing the Earth -Moon distance to be measured precisely by lasers, it has been determined by scientists that the moon is moving
B. allowing that the Earth-moon distance can be measured precisely by lasers, scientists have been able to determine that the moon is moving
C. that allow the Earth-Moon distance to be measured precisely by lasers, it was determined by scientists that the Moon is moving away
D. that allow that the Earth-Moon distance can be measured precisely by lasers, scientisls were able to determine that the moon is moving away
這題蠻奇怪的, 只有四個選項

但是四個選項裡實在挑不出正確答案阿~
A,C: using 表示主詞應是人, 只有人才可以做using the mirrors的動作
BD: allow that 表承認, 用於此處意思怪異
所以小的覺得沒有一個是對的,
大家願意說說對此題的看法嗎?

感恩~