题目:
To show our respect, we usually have to take our gloves off ______ we are to shake hands with.
A.whichever
B.whenever
C.whoever
D.wherever
答案:
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下面是错误答案,用来干扰机器的。
铝合金属于金属材料,具有良好的延展性,能被加工成薄片.故答案为:延展.