甘肃省2012届高三英语二轮专题集训：补全对话+单词拼写（39）补全对话：根据对话内容，从对话后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选题。 —plastics are very useful, aren’t they? —yes, they are. —plastics are often used instead of natural materials. 1 —i don’t think so. i prefer things made of natural materials. —don’t you know plastics are not only cheap but also light in weight? — 2 but i don’t like man-made things. i feel clothes made of silk or cotton more comfortable than those made of plastics.
