A:呼吸系统
B:消化系统
C:神经系统
D:排泄系统
写作:____ 表示____个十和____个一。
将左边和右边的句子连成对话。
①Six oranges, please.____ a. Good afternoon.
②Good afternoon.____ b. Thank you.
③How much are they?____ c. OK. Here you are.
④Good boy.____ d. An apple, please.
⑤Can I help you?____ e. Ten yuan, please.