What can I do for you —_______you see Mr Black, give him myregards

There are ________people in the square.

May I go to the science museum with you next Saturday—You can’t ________you have a ticket. I have only one ticket.

Sir, we have failed to work out this problem. What is exactly the right way?— Look. Only in this way ________ , but you boys _____ a wrong way.

Thomas Edison invented _______ light bulb (灯泡)．He was _______ unusual man.