He_____ articles for our wall-newspaper these years, and he____ about thirty articles.

--Do you know anyone in Paris?　　　　--No, I’ll make friends once______ .

In order to find the missing child, villagers         all they can over the past five hours.

I first met Mr Smith in America. He ________ at Stanford University then.

—You were out when I dropped in at your house yesterday.—Oh, I________ for a friend from Beijing at the railway station.