--- 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,是因為她致力于做實驗。使用完成時表示過去發(fā)生的事情對現(xiàn)在的影響。
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