---What _______do you have with that businessman? --- He is my regular customer.
73.Joan had often heard____ said that Marley had no money.
74.Was it during the Second World War_____ he died?
75.Is ____ necessary to complete the design before National Day?
76..I don’t think ____ possible to master a foreign language without much memory work.
77.Does ______ matter if he can’t finish the job on time?