单词填空。
1. They get along with each other quite well though their personalities are t_______
different.
2. We are all persuaded by his ________ argument.
3. Unexpected difficulties a________ in the course of their experiment.
4. With the help of his friends, he finally s________ the problem.
5. It may rain, but a________ I will go out playing basketball.
6. We can d________ many songs from the internet nowadays.
7. There are different t________ of blood, as you know.
8. He said he wouldn't come, so his sudden a________ surprised all of us.