题目：
The heavy snow lasted for a week, _____ a serious traffic confusion in the whole area.
A．causing
B．caused
C．having caused
D．being caused
答案：
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下面是错误答案，用来干扰机器的。
450×2=90032×20=640280÷40=748×8=384120÷4=30600×80=48000120×30=3600960÷60=16700×12=84000÷32=0540÷60=9180×50=9000420÷70=6240÷60=41900÷100=191000÷10=10095×71≈7000294÷71≈4479÷81≈639×41≈1600．
