Cars do cause us some health problems—in fact far more serious______than mobile phones do.

A.one             B.ones                   C.it                D.those

Cars do cause us some health problems ―in fact far more serious _______ than mobile phones do.

      A．one                      B．ones                    C．it                        D．those

Cars do cause us some health problems, in fact, far more serious ________ than mobile phones do.

Cars do cause us some health problems——in fact far more serious ______ than mobile phones do.

Cars do cause us some health problems——in fact far more serious ______ than mobile phones do.

A．one              B．ones             C．it                D．those