There is/are - There was/were

In the past, ______ ____ no pollution in the rivers.

• THERE IS

• THERE ARE

• THERE WAS

• THERE WERE

Nowadays, ______ ____ much pollution in the rivers in busy cities.

• THERE IS

• THERE ARE

• THERE WAS

• THERE WERE

Before the pollution, ______ ____ lots of fish in the rivers.

• THERE IS

• THERE ARE

• THERE WAS

• THERE WERE

Because of the pollution, ______ ____ lots of dead fish in the rivers.

• THERE IS

• THERE ARE

• THERE WAS

• THERE WERE

In the 1950s and 1960, ______ ____ a big problem with the Singapore River.

• THERE IS

• THERE ARE

• THERE WAS

• THERE WERE

______ ____ a lot of trash in the water. Singapore River was dead back then.

• THERE IS

• THERE ARE

• THERE WAS

• THERE WERE

Now, ______ ____ no trash in the water from the Singapore River. It's all clean!

• THERE IS

• THERE ARE

• THERE WAS

• THERE WERE

Now, ______ ____ many boats, and the water is crystal blue.

• THERE IS

• THERE ARE

• THERE WAS

• THERE WERE

______ ____ many birds near the water nowadays.

• THERE IS

• THERE ARE

• THERE WAS

• THERE WERE