While intelligent people can often ______ the complex, a fool is more likely to make the simple more difficult.

I ________ him for a foreigner. Why didn’t you tell me earlier?

He has changed a lot. He _______ not what he _______. 

Lin Yi isn’t what it used to be．The last decade ______ great changes in the city images．

The train ＿＿＿＿＿ at the present speed until it reaches the foot of the mountain at about nine o’clock tonight.