(A)从方框内选择恰当的句子完成下面对话。
Cindy:You work really hard at English,Lin Pei.__16__
Lin Pei:Since three years ago.
Cindy:Have you ever been to an English-speaking country?
Lin Pei:__17__ I was an exchange student in England for three months
Cindy:Really? __18__
Lin Pei:Thirteen.And it was really an unforgettable
experience to me.
Cindy:So it was.__19__
Lin Pei:I think it's so widely used in the modern world, and it call lead to
a good job.
Cindy:__20__
Lin Pei:Certainly.Practicing more makes perfect(完美的).

(B)在下面对话的空白处填入适当的话语(话语可以是句子、短语或词),使对话完整。
Mary:__21__,Gina?
Gina:Nothing serious.I just have a cold.
Mary:__22__.Have you taken any medicine?
Gina:Yes,but it __23__.
Marc:You’d better see a doctor this afternoon.
Gina:I think so.But the final exam is coming,I'm worried about my lessons
Mary:__24__.I'll help you with it later.
Gina:That’s very kind of you! __25__!
Mary:You’re welcome.