According to the air traffic rules, you ___ switch off your mobile phone before boarding.
—Didn’t you have a good time at the party?—Of course I did.As a matter of fact,I had such fun that time seemed to_____so quickly.
They became friends again that day.Until then,they_____to each other for nearly two years.
In my opinion,life in the twenty-first century is much easier than _______.
-I've studied growing plants as one of my interests.Could I make some suggestions?
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_______,his idea was accepted by all the people at the meeting.