听第13段材料，回答第16至20题．
16．Why did the speaker go to a language school？
A．To teach English．
B．To learn some English．
C．To see his friends from America．
17．How many days a week did the speaker go to the language school？
A．Five days．
B．Six days．
C．Seven days．
18．What did the speaker do one day during the break？
A．Asked for something to eat．
B．Thanked Alice for the cake．
C．Asked Alice a question．
19．What did the speaker think after Alice answered the question？
A．Alice was very helpful．
B．Alice wanted something else except a piece of cake．
C．America was really a"money"country．
20．Why did Alice look at the speaker with a big smile？
A．The speaker was very funny．
B．The speaker understood（理解）her in the wrong way．
C．Alice was very friendly to the speaker．