12.Many shoes nowadays are made of plastics and similar ____

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12.Many shoes nowadays are made of plastics and similar _____.
A) stiff B) staff C) stuff D) stock
16) The students ______for their respective dormitories after school.
A) went B) headed C) spun D) flung

1)选C 原料,材料
整句话的意思是现在很多鞋子都是由塑胶和相同的材料制成的.
A硬的,僵直的,拘谨的,呆板的,艰难的,费劲的,僵硬的
B n.棒,杖,杆,支柱,全体职员,[军]参谋机构,[音]五线谱
vt.供给人员,充当职员
D n.树干,库存,股票,股份,托盘,祖先,血统,原料
adj.股票的,普通的,常备的,存货的,繁殖用的
vt.装把手于,进货,备有,放牧
vi.出新芽,采购
2)选B 这里head是不及物动词 head for 前进,继续朝着或沿着一定方向：
句子的意思是放学后同学们都朝着各自的宿舍走去
A go for 去找,努力获取,被认为,主张,拥护
C spin v.旋转,纺,纺纱 n.旋转
与spin搭配的词组有
spin off 分割：从更大的实体中派生出（如公司或产品）
spin out 翻滚：打滑失控,如汽车打滑而冲出路面
D fling意思是
n.
投,掷,猛冲,暴躁的行动,急冲,嘲弄,讥笑
vt.
猛投,抛,掷,使陷入,挥动,嘲笑,扫视
vi.
猛冲,直冲,急行

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