The hard life in the mountainous area he has adapted to ____ a real challenge to anyone.
A．meanB．meansC．meantD．meaning
B
考查非謂語動詞。adapt to 的賓語是前面的the hard life，故我們不能用D，本句缺少謂語動詞，而且對任何人來說是一個挑戰(zhàn)是一般現(xiàn)在時。故答案為B。
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