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问题: 急求~英语小选择〈1

I triedto get throughto her ,but she simply____not turn on her cellphoneas she was busy。


could should would might?

解答:

i think the answer is “could”。整個句子是過去時態,談論的是過去發生的事情。“我試圖(打她手機)找她,可是她因爲忙而不能開手機。”