【C10】A．springB．summerC．autumnD．winter

The lowest ring of a piston is _____.A.a coil springB.a sealing ringC.an oil distributor r

听力原文：What do you do in winter？ A．B．C．

【C7】A．springB．summerC．autumnD．winter

Speaker A: Do you think the weather next winter will be better than this winter？ Speaker B

61._________A. springB. sourceC. reasonD. motive

Last winter she bought a pair of beautiful 【boots