Do you know the reason ____ he was late?
A
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As is known to us all,the age_____children can go to school is seven.
-“You finally made it,didn't you ?”
-“ Yes， ____ your help,I wouldn't have succeeded.”
The day ____ (在那天我第一次遇见他)was the first of May on the Great Wall.
Nora:Howlonghasthisbookshopbeeninbusiness?
Michel:______1982.
Do you remember the building ____ flew a red flag all the year round ?