prep-T2-Q1

[cindychen47]

Since the start of the space age, more and more littering has occurred in orbits near Earth, often because the intentional discarding of lens caps, packing material, fuel tanks, and payload covers.
A. more and more littering has occurred in orbits near Earth, often because
B. orbits near Earth have become more and more littered, often from
C. orbits near Earth become littered more and more, often resulting from
D. there have been more and more littering of orbits near Earth, often because of
E. there had been littering more and more of orbits near Earth, often with
沒有人問這題
雖然選對了答案 可是不懂PREP筆記里說的
there have been錯誤
是什麼意思?

請指點 謝謝~

[dibert8]

D. there have been more and more littering of orbits near Earth, often because of
littering 單數

[cindychen47]

啊 問了個蠢問題
謝謝 dibert大大~~~

[chris8888]

Since the start of the space age, more and more littering has occurred in orbits near Earth, often because the intentional discarding of lens caps, packing material, fuel tanks, and payload covers.
A. more and more littering has occurred in orbits near Earth, often because
B. orbits near Earth have become more and more littered, often from
我不懂這個often from 指的是什麼? 我第一次作對, 但是第二次竟然痛苦的選了錯的, 因為軌道怎會來自於the intentional discarding of lens caps, packing material, fuel tanks, and payload covers. 感覺邏輯意思有錯.
雖然已經沒東西可以選了.
C. orbits near Earth become littered more and more, often resulting from
D. there have been more and more littering of orbits near Earth, often because of
E. there had been littering more and more of orbits near Earth, often with

[小花]

PP SC 筆記
句子結構：Since…, orbits… have become…, often from…
主詞是orbits，系動詞是完成時態have become，表語是littered，from…介係詞短語作方式副詞


我的理解是 做副詞用
我想應該不是單單修飾主詞
而是修飾orbits near Earth have become more and more littered整句話
因為筆記上說是方式副詞