I didn’t know what time he _wrote__ the letter.是宾语从句吗

I didn’t know what time he _wrote__ the letter.是宾语从句吗
I didn’t know what time he _wrote__ the letter.是宾语从句吗

I didn’t know what time he _wrote__ the letter.是宾语从句吗
是的
what time he wrote the letter是know的宾语

yes