根据释义和首字母补全单词。
1. very bad t_____
2. not free b_____
3.a part of a computer, you can see words and pictures on it s_____
4.a machine that puts your words and pictures onto paper p_____
5. sets of instruction that control your computer p_____
6. unhappy because you are alone l_____
7. think of someone or something a lot m_____
