根据句意及首字母或汉语提示完成句子。
1.There are many English______________ (课程)for us to choose.
2.Is there a____________ (可能的)chance of success?
3.My mother is ill, so I have to stay at home______________ (代替) of going to school.
4.___________(曾经)we lived in London.
5.You must act carefully according to these_______________ (指示).
6. She asked me to a____________ the meeting with her.
7. I want to f___________ the empty bottle with some apple juice.
8 —What do the letters UN s__________ for?
—United Nations.
9. The computer is such a useful t_____________.
10. Can you help me p____________ the walls blue?