ERROR IDENTIFICATION: Even though he was exhausted, .... Even though he was exhausted, Harry wrote to his parents a letter explain the situation => the answer is "D. explain" because we say "write to someone something explaining something else. Sorry I couldn't make head or tail of this expression. Who can give me a clear explanation. Many thanks.
Top answer
I'm afraid I don't understand your question completely. Explain is wrong in the sentence. Explaining is correct.
— Cool Breeze
I'm afraid I don't understand your question completely.
Explain is wrong in the sentence.
Explaining is correct.
You say D is the right answer but you don't give us alternatives A, B and C at all.
Perhaps there is even alternative E?
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I'm afraid I don't understand your question completely. Explain is wrong in the sentence. Explaining is correct. You say D is the right answer but you don't give us alternatives A, B and C at all. Perhaps there is even alternative E?
Anyway, the present participle explaining is right. It can be understood in two ways.