Find the part that contains a grammatical error; choose ‘‘No error’’ if the sentence is correct. Sentence: Everyone is impress by his zeal and enthusiasm.

Introduction / Context:
The item tests correct past participle form in passive constructions with ‘‘be + past participle’’ and common collocation with the preposition ‘‘by.’’

Given Data / Assumptions:

• Structure intended: passive meaning ‘‘Everyone is impressed by…’’
• Given form: ‘‘is impress by’’ (bare verb).

Concept / Approach:
In passive voice, use be + past participle (e.g., ‘‘is impressed’’). The noun ‘‘Everyone’’ is singular, so ‘‘is’’ is correct; the main error is the participle form ‘‘impress’’ instead of ‘‘impressed.’’

Step-by-Step Solution:
Identify passive pattern: be + V3 required.Replace V1 ‘‘impress’’ with V3 ‘‘impressed’’.Correct sentence: ‘‘Everyone is impressed by his zeal and enthusiasm.’’

Verification / Alternative check:
Try an active paraphrase: ‘‘His zeal and enthusiasm impress everyone.’’ Active uses base/agreeing verb; passive needs past participle.

Why Other Options Are Wrong:

• A: ‘‘Everyone is’’ is fine.
• C–D: Noun phrases are correct.

Common Pitfalls:
Confusing base form with participle; forgetting agreement of ‘‘Everyone’’ (singular) and ‘‘is.’’

Final Answer:
impress by