- You talk so much about London. You ________have been there.
- Yeah, I went sightseeing on a tour last summer.
A．mustB．canC．willD．need
A

試題分析：考查情態(tài)動詞的推測用法。You talk so much about London表明“你”對倫敦很熟，一定去過。must have done表示對于過去事實相當(dāng)有把握的推定。can表示“推測”的時候，多用于疑問句和否定句；如果用于肯定句，表示“偶然、個別”的情況。will是對未來的推定。need無推測用法。A項正確。
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