1 John's car broke down due to serious technical promblems.
2 He had concentrated on reparing his car for two days but failed,without neccecary auto parts.
3.His family,seeing and being dissagree with his outstanding infatuateds about cars,did not approved of buying a new car.
4.Facing their accusations,he tried to defend himself against wasting money on car.
5.It is a hard process to teach Alex skating.
6.The senior suporvisor mentioned that the artical still needs more polishes.