Professor Smith has written some short stories , but he is _____known for his plays .

He arrived home after the long journey，________.

You can never be ________ when crossing the street. 

------ How was your trip to Yungang Caves during your National Day holiday?-------- Wonderfully! I’ve never had _______ one before．

—We should adopt ________methods to deal with  some incidents. You know，anything could occur  in that situation.—I got it. Thank you for reminding me.