我们持旅游签证前往阿根廷。

We traveled to Argentina on a tourist ___visa.

明天我不去上课，因为我必须在9点申请签证。

Tomorrow I am not going to attend class because I have to apply for my ___visa at 9:00.

你必须持有有效签证才能进入该国。

You must have a valid ___visa to enter the country.