(届北京市东城区普通校高三3月联考英语试卷)Prices of daily goods ___________ through a computer can be lower than store prices.
-Everyone says you are a good student. You are never late for school,are you? -_______.
_____ all the inventions have in common is ______ they have succeeded.
Last term our maths teacher set so difficult an examination problem _____ none of us worked out.
A cook will be immediately fired if he is found ______in the kitchen.
It was with great joy ______ he received the news that his lost daughter had been found.