I want to write a letter in English,but I don't know ___ about.A._英语解答

I want to write a letter in English,but I don't know ___ about.A.how to write B.what to write

人气：367 ℃　时间：2020-01-18 19:53:16

解答

答案：B
what + 动词不定式,作know的宾语,what 作write about 的宾语,而how是副词,不能充当其宾语,所以正确答案是B.