---Can you tell me how often he practices his English?
---__________.
A．At timesB．At one timeC．At all timesD．At a time
A

試題分析：考查介詞短語：A. At times有時(shí)，B. At one time曾經(jīng)，一度，C. At all times一直，D. At a time一次，句意：--你能告訴我他多長時(shí)間練一次英語嗎？--有時(shí)。選A。
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