重点讲解：
1. care about 关心；在乎；在意；
例句：What I care about is the quality of the goods.
我关心的是货物的质量.pDCZpFKoh。
2. pull up 把（椅子）拉到近处坐下；
例句：Pull up a chair and sit here with us at this table.
拉张椅子过来和我们坐一张桌儿^K&7dc]R@D。
3. mess up 弄脏；弄乱；
例句：I hope they haven't messed up your video tapes.
我希望他们没把您的录像带弄乱=GDagnNhG5&IhT。
4. fall down 倒下；摔倒；
例句：I heard someone fall down the stairway.
我听到有人摔下楼梯Ti[5zecLSFIM_t03GH。