Do you know whom__a.the first watch was inventedb.was the first watch inventedc.the first watch was invented byd.the first watch was invented of

Do you know whom__a.the first watch was inventedb.was the first watch inventedc.the first watch was invented byd.the first watch was invented of what do you know Do you know what Do you know Facebook? do you know my how do you know Do you know Do you know? do you know 亲,Do you know? Do you know what? do you know there? do you know sex How do you know? Do you know? do you know these Do you know do you know是什么意思