【推荐1】About 74 percent of the parents said online courses have added an extra burden on them________they have to spend more time taking care of and assisting their children. （用适当的词填空）

【推荐2】Enjoying ________ total investment of 31.17 billion yuan, the trip between the two cities will only take 40 minutes ________ the train will travel at an average of 250 km/h. (用适当的词填空)