Moderneconomics________thecountry’sagriculturalpolicies.
Ifanearthquakeoccurred，someoftheone-storeyhouses________.
在发生人感染H7N9禽流感确诊病例的县(区)内，应当在病例确诊后开展为期()的强化监测
句子写作：”HappyChristmas“hesaid.
In1900,theUnitedStatesrankedfirstintheworldintheproductionof________.
