SAT Standard Writing - Verb tense

In 1953, Watson and Crick finally ____ something that scientists were searching for - the structure of DNA.

Admission officers ____ at several factors when they determine whether to admit an applicant.

I like to shop at the used bookstore as the people there are so friendly. It ___ a popular place to discover great books

Whereas astrologers pretend to tell the future, astronomers ____ on finding out facts about the stars and galaxies.

While online tutorials make learning convenient, teachers ____ students accountable in a way that promotes action.

At the zoo, monkeys play on handlebars and exotic birds ____ in their elaborate cages.

There ____ a number of steps you can take to determine whether game design is the right field for you.

The host presented the aware on the show and the winners ____ honoured to receive them.

When my uncle ____ to buy a new computer, the saleswoman told him that he could not get a discount.