Students don’t go to school ________ Sundays.[ ]

Some scientists think that it may take ______years to make robots look like people, and do the same things as us.

Unless it ______, we’ll visit Hangzhou Wild Animal Park this weekend.

Do you play computer games? —No,_______. I don’t like them at all.

___ the morning of November 20, 1915, the workers came to Chicago to show their mourning ___ Joe Hill. [ ]