问题补充:
单选题Zhengsaysthatthemostdangerousthingaboutacreditcardis____apersonisn’talwaysawareofthefact____he’sspendingmoney.A.that; thatB.what; thatC.that; whatD.what; which
答案:
A解析____ a person isn’t always aware of the fact是表语从句,且句意完整,用that引导;____ he’s spending money是the fact的同位语从句,语意完整,用that引导。所以选A。