| Idx | 2194 |
|---|---|
| Keyword | proof |
| Type of Sentence | ✗ |
| Error Sentence | Today we have scientific proofs that tobacco is harmful. |
| Correct Sentence | Today we have scientific proof that tobacco is harmful. |
| Cloze Error Sentence | Today we have scientific [[proofs]] that tobacco is harmful. |
| Cloze Sentence | Today we have scientific [[proof]] that tobacco is harmful. |
| Cloze Answer | proof |
| Choices | proof | proofs |
| Explanation | Proof (= evidence) is usually an uncountable noun: 'Investigators now have proof of his involvement in the arms deal.' |
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