题目

SAT 语法分析.
Although the night shift is (fully staffed),the managers (always holds us )responsible for (that shift's)work if (it )is not finished when we arrive in the morning .为什么always hold us 是错的.那这里的IT为什么不是错的.
Members of Alvin Ailey company (have )once again (shown how )the combination of strength and (being agile)(can produce )beautiful movements .为什么being agile 是错的,那为什么can produce 不是错的?

提问时间：2021-03-28

答案

1."always hold us"
--------没错
2.“always holds us”
--------错,主语是 the managers (复数),错在主语谓语不一致.
3.it 指代 work,作从句的主语.你认为它错很可能你在用中文翻译法(纯属猜测!),觉得 it 多余.
4.strength and agility 构成所需的 n.and n.的平行结构,即being agile 改成 agility.can produce 是宾语句子的谓语,没错的.宾语从句的主语和谓语和宾语很整齐很简单,是：the combination of strength and agility (主语) can produce (谓语) beautiful movements (宾语).