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--- I haven’t seen Mary recently. And you?
--- Me neither. I’m afraid she _________ to her experiment for too long a time.
A．is devotingB．was devotedC．has been devotingD．has been devoted
D
考查時(shí)態(tài)。固定詞組be devoted to致力于。根據(jù)上下文可知我最近沒有空間Mary,是因?yàn)樗铝τ谧鰧?shí)驗(yàn)。使用完成時(shí)表示過去發(fā)生的事情對(duì)現(xiàn)在的影響。
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