he must have gone to Japan,_____he?

问题描述:

he must have gone to Japan,_____he?
he must have been to Japan,_____he?
he must have gone to Japan last week,_____he?
he must have been to Japan last week,_____he?

he must have gone to Japan,hasn't he?he must have been to Japan,hasn't he?he must have gone to Japan last week,didn't he?he must have been to Japan last week,didn't he?