他的笑容很真诚。

His smile is ___genuine.

这块手表是正品劳力士，不是仿制品。

This ___genuine Rolex watch is not a fake.

他的道歉听起来很真诚。

His apology sounded ___genuine.

这幅画是毕加索的真迹。

This painting is a ___genuine Picasso.