1 . __________ a weight of up to 300 kilograms, they can run at a speed of around 64 kilograms per hour. (用适当的词填空)

2 . ______________ (虽然) the fact that it’s raining cats and dogs, Jim still managed to attend the meeting on time.

3 . A number of people have admitted that __________(尽管) their success, they aren’t happy.（根据汉语提示单词拼写）