Mr. Harris enjoys (a)   (invite) people out to dinner.

In the old days, gentlemen challenged their rivals (a)   . (fight)

As the famous saying goes, there’s no use (a)   (cry) over spilt milk.

Jim stopped (a)   his shoelace. Wait for him. (tying / to tie)

My wife always volunteers (a)   cakes PTA meetings. (baking / to bake)

Don’t waste my time (a)   about your salary. (complaining/ to complain)

Eva is having trouble (a)   on the exam. (concentrating / to concentrate)

Please allow me (a)   your Facebook page. (joining / to join)

You won’t forget (a)   milk on your way home, will you? (picking up /to pick up)