试题题干
WORD FORMATION
Complete the following sentence with the proper form of the word in the bracket.
(active) The slightest pressure on the container is enough to
the alarm.
参考答案
试题解析
此处缺少动词。
be+enough+to do sth.：足够做某事。所以变active为动词activate。
句意：容器上最轻微的压力足以触发警报。