The government spokesman has to____ his words before responding to reporters.

nce a year by fire officials, whether a school is large of small, is a regulation that must be carried out in this country.

________ from what he said and did, Mr. White is a doctor.[ ]

Every few years, the coal workers ________ their lungs Xrayed to ensure their health.[ ]

下列句子中“其”字的用法不同于其他三句的是（ )