A)It is of primary importance B)in swimming to learn   C)to breathe properly   D)No error

A)Recently I visited Kashmir   B)and found the sceneries  C)to be marvellous    D)No error

A)New types of electrical circuits   B)has been developed   C)by our engineers   D)No error

A)Radar equipments B)that is to be used C)for ships must be installed carefully   D)No error

A)Of all those involved   B)with the accident   C)none was seriously injured       D)No error