—No, he ________ .He is ________a letter.
A：doesn't ,write
B：isn't , writing
C：isn't, writes
D：isn't , writeing
下列灾害中属于地质灾害的是（ ）
①鼠害 ②滑坡 ③台风 ④泥石流 ⑤风暴潮
