22. Laura thinks Melbourne is the most liveable city in Australia. A. Laura thinks Melbourne is more liveable than any other cities in Australia. B. Laura thinks Melbourne isn’t more liveable than any other cities in Australia. C. Laura thinks Melbourne isn’t as liveable as many other cities in Australia. D. Laura thinks Melbourne is as liveable as other cities in Australia. 23. They often went to school by bike when they were young. A. They used to go to school by bike when they were young. B. They used to going to school by bike when they were young. C. They didn’t use to go to school by bike when they were young. D. They used to went to school by bike when they were young. 24. “Please do not litter as you are walking along the coast,” the guard said to us. A. The guard told us to litter as we were walking along the coast. B. The guard told us not to litter as we were walking along the coast. C. The guard told us to not litter as we were walking along the coast. D. The guard told us not to litter as we are walking along the coast. 25. People know that PhongNha Cave was found in the 16th century by Cham people. A. It knows that PhongNha Cave was found in the 16th century by Cham people. B. It is known that PhongNha Cave was found in the 16th century by Cham people. C. PhongNha Cave was known to be found in the 16th century by Cham people. D. PhongNha Cave is known to be found in the 16th century by Cham people.