A few days ago I saw an interesting program … television.

 "Alice in Wonderland" was written … Lewis Carroll in 1865.

 It is often faster to walk than to go … bus.

 The problem has been getting worse … a long time.

during;  
since; 
for.

I wanted to … for being late.

excuse;  
sorry;  
apologize. 

 Someone … a mistake.

 did;
made;
was. 

 The clerk said, "… to help you, but we haven't any vacant rooms."

I don't know where Mr. Wilson is. He isn't in his office so he … in one of the studios.

has to be;  
must be; 
needs to be.

I'm afraid it'll … me some time to find him.  

 Can you wait here … he gets back?