根據中文提示,把對話中缺少的內容寫在線上。這些句子必須符合英語表達習慣。打句號的地方，用陳述句;打問號的地方，用疑問句。

提示:Lucy要去藝術展覽中心,向一位男士問路，該男士告訴她如何前往。

(L=Lucy;S=Sir)

L: Excuse me ,sir.      51       the Art Exhibition Centre?

S: Yes but it is quite far.It'S about an hour'Swalk.You can take a bus there.

L:           52       ?

S: You can take Bus No. 15.

L:           53         ?

S: About 20 minutes. And you can also take a taxi.

L: Taxi? That'S a good idea. Thank you very much.

S:     54             .

L: Goodbye.

S;       55       . 

What problem did Maria meet with in winning the prize? 

• A、She named the comet on her own 

• B、She did not use the required telescope. 

• C、She did not report her discovery in time 

• D、She discovered the comet with her father 

30

• A、missed 

• B、kept 

• C、regretted 

• D、excused