comparatives - correct the mistakes

My umbrella is biger than yours.

The air quality in Tsim Sha Tsui is bad. The air on Lamma Island is more fresher.

The vet said my cat needed to lose some weight, so now she is thiner than before.

Stopping wearing that hoodie. Get a coat. It's warmer.

Walking in mud is disgusting. Walking in mud when it's raining is more disgusting than.

The old scissors are dull. This new pair is sharper.

I like going to Jen's Cafe more than Starbucks because the staff is more nice.

Asian elephants are not small, but African elephants are more bigger than.

We're not going to win. Their team has 20 members more than ours.

I'm getting lunch set B. I think it looks more attractiver than the noodles.

I think doing listening is easier doing Read Right.

Ew. My pizza is more disgusting than yours.