Làm và giải thích giúp tôi

Here are the mistakes in each sentence: 1. "How far does it take local people to get ready for the festival?" Answer: "How far" should be replaced with "How long". 2. "In Australia, you mustn't to comment on a person's accent." Answer: Remove "to" after "mustn't". 3. "When you visit a temple in Thailand, you has to follow some important customs." Answer: Change "has" to "have". 4. "A lot of Vietnamese people have the custom to buy sugar cane on New Year's Eve." Answer: Change "the custom to" to "the custom of". 5. "Because my grandmother is old, she tried to climb up Yen Tu Mountain last Sunday." Answer: Change "Because" to "Although" (or change the sentence structure).