Choose the correct adjective forms in each sentence.

Choose the correct answer.

I thought you ran [slow|slower|slowest] than George?!

I don't trust Emily; she's as [sly|slier|sliest] as a fox.

Mark said it was the [bad|worse|worst] book he had ever read.

That car turned out to be a bit [--|more|most] expensive than we thought.

The [good|better|best] you prepare for the test, the [high|higher|highest] mark you will get.

American literature is as [--|more|most] popular with readers as British.