在茫茫考研征途中，英语是每位考生必须征服的高峰。2020年考研英语的题目，无疑是对考生英语综合能力的全面考验。以下是19题的答案解析：
【19题】
Your friend has just invited you to a dinner party. You want to express your gratitude, but you are busy with work. Which of the following replies would be the most appropriate?
A. I'm sorry, I can't come. I have an important meeting.
B. That sounds wonderful! I can't wait to see you.
C. I'm really sorry, but I can't make it this time.
D. It's very kind of you, but I'm not free this evening.
【答案解析】
正确答案是C。在这种情况下，表达感谢的同时，也要礼貌地说明自己无法出席的原因。A选项虽然表达了不能参加的原因，但语气较为生硬，不够礼貌；B选项直接表示期待，没有说明无法参加的原因；D选项虽然客气，但同样没有说明无法参加的原因。因此，C选项最为得体。
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