一道语法题

melody8818

Essential a nineteenth-century instrument, the calliope was usually played outdoors and was a part of fairs,holiday gatherings,and other such activities.

a.Essential
b. a part
c. holiday
d. other such.

answer is A. but how to correct it? pls help.

Diana

改成Essentially. 补全后这里的essential修饰的是助动词be，因此应该用adv.形式。

困难是弹簧

Essential---->Essentially

adv+同位语是正确表达。

困难是弹簧

DianaMM说得对！
呵呵，居然同时答了这道题，一秒不差。

melody8818

我没想到这个adv.修饰的是be动词,只是觉得这个adv.+n.的结构实在读着有点别扭.还是你们说的对.谢谢,这儿真好!

Diana

弹簧兄，我们这也应该算是心有灵犀的说，呵呵。

melodyMM，别客气，常来讨论呀！