重点讲解：
1. look for
找；寻；
eg. I looked everywhere for ideas.
我到处找点子。
eg. Jane craned her neck to look for her mother in the crowd.
简伸长脖子张望，在人群中找她的母亲。
2. play with
随意摆弄；弄着玩；
eg. She stared at the floor, idly playing with the strap of her handbag.
她眼睛盯着地板，漫不经心地摆弄着手提包的带子。
eg. Don't play with fire.
不要玩火。
3. cross the road
过马路；
eg. Watch out for cars when you cross the road.
过马路时当心车辆。
eg. Don't cross the road when the light is red.
红灯亮时不要横穿马路。
