Helen made many mistakes in the maths test She realised that ___important to be careful.A was it B was there C it was D there was 要说明
问题描述：
Helen made many mistakes in the maths test She realised that ___important to be careful.A was it B was there C it was D there was 要说明
答
选C. 首先，是宾语从句，只能用陈述语序。其次，不定式to be careful 是真正的主语，此处缺新式主语，故选C
答
选C 首先排除AB,因为that后面是一个陈述语气的从句.其次排除D,因为这里it是形式主语,不须翻译出来,意思是“考试认真是很重要的”.D There be句型表示“有”,用在这里显然是错误的