1 . The sight of those homeless people begging on the street made my heart a________.（根据首字母单词拼写）

2 . 从所给短语中（一个多余）选择并用其正确形式完成句子

on one's back about...; through thick and thin; in full measure; eat away (at ); make a difference; take advantage of, get into shape; at a loss; back down; come between...and ...; contribute to; take on; or rather

1. Living well is the safest and most effective way__________.
2. There are so many possibilities that I have enough confidence in my ability__________to my future.
3. Noise pollution and light pollution may__________sleep problems for some people.
4. If we__________on this issue now, they will assume we are weak.
5. Whatever happens, we will work together and rise to challenges__________
6. Faced with the unexpected problem, we were all looking at each other, __________for words.
7. I would let nothing__________me___________the subject in hand.
8. He got home late last night, __________early this morning.
9. The coastline is__________by all kinds of pollutants year by year.
10. In the past ten years, great changes have taken place in my lovely hometown, making it__________a new look.
11. The headmaster advised that we__________what our school provides for us to study better.
12. His parents are always__________his performance at school.