这sentence uses a colon where a semicolon would be more appropriate. While a colon requires an independent clause before it, when trying to separate two independent clauses it is best to use a semicolon. Also, in the example sentence, the first letter of the second clause is incorrectly capitalized. The best version of the sentence reads, "Jeremy flew to Europe last week; he said he wanted to be alone for awhile."

The error here occurs in the punctuation of the dependent introductory clause. Since this opening clause is introductory in nature, it is considered a dependent clause. Semicolons can never punctuate dependent clauses, they must follow independent clauses. The rest of the sentence was correct as written.

Here, the correction simply involves making the adjective "bitter" into the adverb "bitterly." This is necessary because it modifies the verb "was" rather than the noun cold.

Comparative prepositions (like "senior" or "junior") are followed by "to", not than, from, or against. The error here is "than," which needs to be replaced with "to" in order for this question to be correct.

The use of the pronoun "them" is ambiguous in this context, as "them" could technically refer either to "his papers" or to "his coworkers." "Them" should be replaced with "his papers."

这is a very common error of pronoun case, which leads the sentence to incorrectly conclude with a preposition. Rather than using the subjective-case "who" in saying "who I am speaking to," it is correct to use the objective-case "whom." The correct version of the sentence reads, "I have no clear idea to whom I am speaking."

The error queried here was a simple error of verb tense. Since "described" is not underlined it must be correct, and since this verb is in the past tense the next verb "writes" should be in its past tense form: "written."

这sentence expresses a hypothetical condition that is contrary to fact ("I," by definition, am not "you"), and therefore needs to be expressed using verbs in the subjunctive mood. "If" is a usually a good indication that a sentence will be in the subjunctive mood. In the subjunctive, "were" should be used instead of "was." "If I were you, I would leave that job immediately."

In this sentence, "all students" establishes a plural subject. Therefore the "rich, famous author" must be changed to a plural form: "All students in my program wish to become rich, famous authors."

Because the writer is included in "all students in my program," the most correct version of this sentence would include the author in the assertion that "none of us will."

这question asks you to recognize and correct a pronoun-antecedent agreement error. "All workers" is plural, therefore the pronoun that refers to it must also be plural. Thus, the correct version of the sentence is: "It is explicitly stated in the employee handbook that all workers must provide their own steel-toed shoes."

If the workers are made individual ("each worker") then the correct pronoun form would be "his or her," because the individual pronoun is required but the gender of the worker is not specified.