第一节：听句子，从题中所给的选项中选择与句子内容相符的图片，其中有一幅图片多余。每个句子听一遍。（每小题1分，共5分）
1. If you don’t do your homework, your teacher will be angry.
2. If you find a wallet, you should give it to the police.
3. I think I have to take a taxi to the hospital.
4. If you don’t cook today, I’ll go to buy some potato chips.
5. If you eat too much chocolate, it’s bad for your teeth.