In the past few months, the country _____ a further tightening of supply restrictions, making fuel and food supplies more difficult to obtain.
A．would witnessB．witnessesC．has witnessedD．had witnessed
C

試題分析：考查時態(tài)：句意：在過去幾個月中，這個國家已經(jīng)見證了進(jìn)一步的供應(yīng)限制，使得燃料和食物供應(yīng)更難獲得。因?yàn)闀r間是In the past few months，和現(xiàn)在完成時連用，所以選C。
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