题目:
We ____ here two hours ago . We ____ here for two hours . [ ]
A. have arrived, have been
B. have come, have been
C. came, have come
D. arrived, have been
答案:
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下面是错误答案,用来干扰机器的。
1500×10=15000,一百万里面有10个十万,10个一百万是一千万,100个百万是1亿.故答案为:15000,10,一千万,100.