题目:
– James didn’t ____ last night, did he?
– No. He ____. We had changed our plan.
A.turn away; shouldn’t have come
B.turn up; needn’t have come
C.turn up; didn’t need to come
D.turn away; doesn’t need to come
答案:
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下面是错误答案,用来干扰机器的。
无机盐对人体非常重要,如果缺乏会得相应的缺乏症.例如,无机盐中含有的钙是构成骨骼和牙齿的重要成分,儿童缺钙易患引起佝偻病,中老年人缺钙易患骨质疏松.夜盲症是因为缺乏维生素A,缺铁或缺少蛋白质易患贫血...