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1£®You ________ come at 4 o¡¯clock if the plane arrives on time£®

2£®I didn¡¯t go shopping this morning as I ________ do the housework£®

3£®She ________ come to see me yesterday, but she forgot£®

4£®You ________ ask for permission before you left the table£®

5£®As they didn¡¯t understand, I ________ explain everything again£®

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