To identify the error in the given sentence, let's go through each part:

Option A) a - This option is correct because "the travel" is a singular noun, so it should be preceded by the indefinite article "a" instead of the definite article "the."

Option B) b - This option is incorrect because "across the sandy desert" is a prepositional phrase that provides additional information about the travel. There is no error in this part.

Option C) c - This option is incorrect because "was an exhausting one" is a complete and grammatically correct sentence. There is no error in this part.

Option D) d - This option is incorrect because "for the caravan" is a prepositional phrase that provides additional information about who the travel was exhausting for. There is no error in this part.

Option E) e - This option is incorrect because there is an error in part a.

Therefore, the correct answer is A) a.

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• Wrong explanation

To answer this question, let's analyze each part of the sentence:

No sooner we entered (a) - This part of the sentence is incorrect. The correct form should be "No sooner had we entered." The structure "No sooner + auxiliary verb + subject + main verb" is used to express that one action happened immediately after another action.

than (b) - This part of the sentence is incorrect. There is no error in this part.

he got up (c) - This part of the sentence is incorrect. The correct form should be "he had got up." The past perfect tense ("had + past participle") is used to indicate an action that occurred before another past action.

and left the room. (d) - This part of the sentence is incorrect. The correct form should be "and had left the room." Again, the past perfect tense is used to indicate an action that occurred before another past action.

All correct (e) - This option is incorrect because there are errors in parts (a), (c), and (d) of the sentence.

Therefore, the correct answer is B, as there is no error in part (b) of the sentence.

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• Wrong explanation

To answer this question, we need to understand the correct usage of conjunctions.

Option A) From - This option is incorrect because "from" is not the appropriate conjunction to use in this context. It does not convey the cause-effect relationship between the two parts of the sentence.

Option B) Since - This option is correct because "since" is a conjunction that indicates the cause or reason for something. In this case, it is used to show the reason for believing something.

Option C) For - This option is incorrect because "for" is not the appropriate conjunction to use in this context. It does not convey the cause-effect relationship between the two parts of the sentence.

Option D) none of these - This option is incorrect because option B (since) is the correct answer.

The correct answer is B) Since. This option is correct because "since" is the appropriate conjunction to use in this context to indicate the cause or reason for believing something.

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• Wrong explanation