[答案]
TherearethirtydaysinApril.
[解析]
thirty days三十天,There are有,in April在四月。根据句号及所给单词可知,此句为there be句型,时态为一般现在时,结构为:There are+主语+其他.主语为thirty days,介词短语in April放句末,构成句子:There are thirty days in April.译为:四月有三十天。
故答案为:There are thirty days in April.
[点评]
本题考查了"there be的一般现在时用法,",属于"常考题",熟悉题型是解题的关键。