这个男孩很聪明，他能很快解出这道数学题．
The boy is enough to work out the math problem ．
Please follow the rules．Don't t （触碰） the photos in the museum．
An old man began to collect rubbish along the river b （岸） years ago．
Look!The boys are k （踢） the ball around in the yard．
My father's T﹣shirt has completely lost its s （形状）．