By 8pm, I …………………………………………… the Simpsons marathon for 12 hours. (have)
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By 8pm, I …………………………………………… the Simpsons marathon for 12 hours. (have)
=> had had
thì quá khứ hoàn thành
Đáp án: had had
- Vì "By 8 pm" là DHNB thì QKHT, cấu trúc: S + had + Vp.p + ...
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