usually通常所以要用一般现在时,FREE是形容词,所以要加BE动词
所以,选D
what do you usually do when___________ A:you free B:are you free C:you'll be free D;you're free
what do you usually do when___________ A:you free B:are you free C:you'll be free D;you're free
请给出理由 when后面怎么加语句
请给出理由 when后面怎么加语句
英语人气：538 ℃时间：2020-05-20 08:41:12
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