聽第二篇短文，回答第16-20小題．
16．When does the writer like to sit by the river？
A．Every afternoon．
B．Last Sunday afternoon．
C．On sunny afternoons．
17．What were the children doing while the writer was sitting on the river bank？
A．They were rowing a boat．
B．They were running．
C．They were playing ball games．
18．What happened to the man on the boat after the ball hit him？
A．He was still on the boat．
B．He hit the children．
C．He fell into the river．
19．What did the children do after they kicked the ball so hard？
A．They stayed there and waited for the man．
B．They laughed happily．
C．They ran away quickly．
20．How did the man feel when he knew what had happened？
A．He felt sorry for that．
B．He felt a little angry．
C．He felt happy and thought it funny．