急求牛人解决几道sat语法题!
1.Nursing and physical therapy （B are examples of health-care fields that
) have shortages in staffing.
E exemplify health-care fields where they
但E为何不对?
2．male spiders live not in weds〔of their own making〕中不能理解括号里的词.我觉得是of their own,不知making何解?
3．at a time when interest in 20th century classical music [seems] on the verge of disappearing ,the avant-grade compositions of the 1960s [manage] to retain their popuarity.为什么用了现在时不用过去时?