Bluebird, the car he was driving, had been _____ made for him [ ]

It is diving _____ great speed that often causes serious accidents

Oh, boy, why are you just playing games all day? Can’t you find something ______ doing at all?

natural parks are important forpreserving animals, which would ________ risk dying out

What do you think of the grammar book— Oh, it really is ________ useful reference book, which is worth reading ________ second time.