Since the start of the space age, there had been littering more and more of orbits near Earth, often with the intentional discarding of lens caps, packing material, fuel tanks, and payload covers.
语法 Sentence Correction-3575
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正确的用户笔记
BONE221 2016-08-11 17:39:53
1. 清晰的句子是主谓宾齐全。there be句型由于缺乏主语而在GMAT考试中比较少为正确选项。 2. littering在这里作名词，表示orbit到处都是垃圾的状态，优先使用动词。
love刘小宅 2016-03-02 16:35:06
there have been littering表达方式错误;介词with不能准确地表达原句“来自”的意思。
CatherineSu 2014-11-04 20:25:15
with 不能表示from，there be 句型不好
树熊潘比 2016-10-24 08:24:21
过去完成时没有道理，句中没有一个过去的时间点
ypheroin 2016-01-13 15:05:13
had been时态不对，with 不能表明垃圾的来源
liqijie3242656 2014-08-02 09:25:50
there be不好，with不能很好表示出“来自”的意思
