He found it hard for Alan to focus on his teachers for longer than five minutes, _________ if the lecture was boring. 

 They have earned lots of money, so I______ believe that the business is a success. 

----That kind of computer is far too expensive. ----- I’ll buy one, ______ .

I don’t mind picking up your things from the store. ______, the walk will do me good.

In order to make up for the lost time, they are working ______.