10.he has a headache because he _too long.A has been reading B had read C is reading D read

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10.hehasaheadachebecausehe_toolong.AhasbeenreadingBhadreadCisreadingDread10.hehasaheadachebecausehe_

10.he has a headache because he _too long.A has been reading B had read C is reading D read
10.he has a headache because he _too long.A has been reading B had read C is reading D read

10.he has a headache because he _too long.A has been reading B had read C is reading D read
10.he has a headache because he _too long.A has been reading B had read C is reading D read
答案是A has been reading

A 现在完成进行时,强调动作从过去开始,持续到现在,还可能持续下去。