1.Underline the correct form.


Some kinds of fish contain /are containing high levels of dangerous metals.

Scientists nowadays slowly begin to understand /are slowly beginning to understand more about how the brain works.

What do you think /are you thinking of Kale's new hairstyle? It's unusual, isn't it?

Loud music can be really annoying. Some people don't realize /aren't realizing what a nuisance it can be.

You can't really have seen a UFO! You imagine /are imagining things!

Technicians report that they have /are having difficulty installing the new computer system.

No wine for me! I take / I'm taking antibiotics for an ear infection.

In career terms, having a good degree appears /is appearing to make little difference.

The National Theatre considers /is considering putting on a new production of Uncle Vanya.