单选题 The President______the public that taxes would not be increased after the election.
【正确答案】 C
【答案解析】解析：形近词词义辨析。四个单词均以-sure为词缀。ensure sth．／that“确保……”；insure sb．against“为某人投保”；secure sb．／sth．“使某人或某物安全”；assure sb．“向某人保证”。故答案为C。