根据给出的单词，填写正确形式。
1. You can't watch TV until you finish (do) your homework.
2. Most parents don't think it is ( health) for children to stay up too late at night.
3. At present, our spacecraft are too slow to ( carry) people to Mars.
4. The tunnel under the Changjiang River makes it much ( asy) to get to Pukou District than before.
5. It is said that many (America) teenagers will come to watch the 2014 Youth Olympic Games in Nanjing.
6. —Mum, today is your day, the Women's Day. Here are some ( flower) for you.
—It's very thoughtful of you. Thanks, Kitty.
