It is (believed)that trees can warn (each other) (to) danger by releasing (chemi

游客2024-06-27 52

问题 It is (believed)that trees can warn (each other) (to) danger by releasing (chemicals) into the air.

选项 A、believed
B、each other
C、to
D、chemicals

答案 C

解析把to改为of，warn sb．of sth．是固定搭配。

转载请注明原文地址:http://tihaiku.com/zcyy/3653016.html

相关试题推荐

随机试题

最新回复(0)

Itis(believed)thattreescanwarn(eachother)(to)dangerbyreleasing(chemi