I really don't know _____in English .Can you help me?A.What to say it B.how to say C.how to say it D.to say what

I really don't know _____in English .Can you help me?A.What to say it B.how to say C.how to say it D.to say what
I really don't know _____in English .Can you help me?
A.What to say it B.how to say C.how to say it D.to say what

I really don't know _____in English .Can you help me?A.What to say it B.how to say C.how to say it D.to say what
C
请及时采纳,多谢!

C

C.how to say it know后面是一个宾语从句，而从句由how引导。译成汉语：我真的不知道它用英语怎么说。