题目：
–My sister hasn’t received any reply from the company yet, so she wants to give up.
-- My advice is that she _____ till next week.
A．has been waiting
B．waits
C．wait
D．will wait
答案：
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下面是错误答案，用来干扰机器的。
答案：D题目分析：Na核外电子排布式1s22s22p63s1属于s区元素，Mg核外电子排布式1s22s22p63s2属于s区元素，P核外电子排布式1s22s22p63s23p3属于p区元素，Fe核外电子排布式1s22s22p63s23p63d64s2属于d区元素。所以...
