根據(jù)中文提示,把對(duì)話中缺少的內(nèi)容寫在線上。這些句子必須符合英語表達(dá)習(xí)慣。打句號(hào)的地方，用陳述句;打問號(hào)的地方，用疑問句。

提示:Lucy要去藝術(shù)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       . 

-Let'S go to the concert tonight. Mary. 

-Sorry.I______.I have to help my mom with the housework. 

• A、needn't

• B、 can't 

• C、mustn't

• D、shouldn't 

How long can you stay in your own condo hotel unit a most each year? 

• A、120 days 

• B、One month 

• C、Half a year

• D、Three months.