George once told me that he would visit our house，but，for various reasons，he________so far.
A．didn'tB．hasn't
C．hadn'tD．wouldn't
B
B　考查時態(tài)。句意：喬治曾告訴我他將拜訪我，但由于各種原因，他到現(xiàn)在還沒有來過。so far到目前為止，是現(xiàn)在完成時態(tài)的標(biāo)志詞。
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