Comple the sentences with the comparative form of the adjectives in brackets

Comple the sentences with the comparative form of the adjectives in brackets.
1. Which mouth in Vietnam is .........................., October or December? (cold)
2.Which city is ........................, London or Rome? (old)
3. Which mountain is .........................., Mount Everest or Mount Fuji? (high)
4. Which animals are ......................., cats or horses? (fast)