求助og11紫皮第1题

susenmayorer

1、some bat caves,like honeybee hives, have residents that take on different duties such as defending the entrance, （acting as sentinels and to sound） a warning at the approach of danger, and scouting outsides the cave for new food and roosting sites.

划线见括号内

B.acting as sentinels and sounding

请问大家正确答案B中的sounding 是和哪个平行的？如果是B 那么句中就有2个and，这与平行结构只有最后一个用and不是矛盾吗？谢谢！

IORIYAGAMI

acting as sentinels and sounding 是一个局部并列,该局部并列同整个句子构成大并列

littlestoner

对,同意楼上看法,注意后面那个and前的","是不能省的.

chasemer

and sounding 前面没有.