Have you got any trouble finding your way in Shanghai? — Yes，I tried to fid the way to the airport but ______

What about the student in your class, Mr. Wang?— The doctor said that sleep caused him poor memory and poor concentration.[ ]

Hey, guys. Do you often have a good time ___ after-school activities–Of course, we do. And we always have a lot of time ________soccer.

I did my homework ______________;

She for the professor who was ill. [ ]