单词拼写。
1. A friend in need is a friend (确实).
2. I went to the American embassy to (寻找)help.
3. Your theory is (难以执行的).
4. Smoking is (有害的)to your health.
5. They multiplied and (存在)on the earth for more than 140 million years.
6. Several (加拿大人)visited our school last week.
7. my (重量)will be less than on the earth.
8. Two pieces of (行李)are in the car.
9. The boy lied that a hen was lying under the tree (产卵)eggs.
10. I cheered up immediately and (漂浮) weightlessly around in our spaceship.