30. Scissors should never be carried by the handle.
Answer: C
Scissors should never be carried by the handle.
Carrying scissors by the handle is incorrect because it can lead to accidents and injuries. The phrase "should never be carried" indicates that the action of carrying is not safe or advisable.
A) Carry
"Carry" is the base form of the verb and does not fit the grammatical structure of the sentence, which requires a past participle to discuss an action that should not occur. Therefore, this option is incorrect.
B) Carries
"Carries" is the third person singular present form of the verb and does not match the tense needed in the sentence. The sentence is discussing a general rule about actions, not a specific subject performing the action, making this option incorrect.
C) Carried
"Carried" is the correct past participle form of the verb that aligns with the modal "should" in the sentence. This construction appropriately conveys that the action of carrying scissors by the handle is not permitted.
D) Carrying
"Carrying" is the present participle form of the verb, which does not fit the context of the sentence. The sentence requires a past participle to form a proper rule, thus making this option incorrect.
Conclusion
The correct answer is "carried" as it appropriately completes the sentence's structure, indicating a prohibition on the action of carrying scissors by the handle. The other options fail to fit the grammatical requirements of the sentence, either by being in the wrong tense or form, and therefore are not suitable choices.