Present Perfect vs. Simple Past

I __that new adventure movie five times so far this week.

What new plants __ on their last trip?

On February 18, 1930, Clyde Tombaugh __a new object in the night sky.

Kaiko was a robot ship. It __Earth's deepest oceans between 1995 and 2003.

Where __ for your lost car keys so far?

Scientists __ that humans have at least 9 senses, not 5. This has affected new research.

I have worked with a few different researchers. Last summer, I __at an ancient city in Mexico.

They like to try different sports. They __ basketball, soccer, and baseball.

___watched a bee fly? You've probably discovered that they don't fly very fast.

We ___ the perfect house to buy last April. Last May, we moved into it.

We understand Egypt's history because researchers __many artifacts over the years.

The number of people who explore the rain forest __ in this century.

Who ___to be a detective?

This morning, I am cleaning the house. So far, I __ several coins under the furniture.