用方框里的适当的句子补全对话（每空1分，共5分）

A: Excuse me, Madam.   小题1:  

B: Go down this street. At the end of the street,  小题2:  

A:   小题3:  

B: It’s about three miles away from here.

A:   小题4:  

B: Sorry, There’s no bus to go there.

A:   小题5:  

B; Nearly half an hour. You should take a taxi there.

A: Oh, thanks a lot.

太阳灶每小时吸收热量为8.4×10⁶J，相当于          kg的焦炭完全燃烧放出的热量．如果太阳灶的效率为50%，则每小时能使       kg的水温度升高50℃（焦炭的热值为3.0×10⁷Jkg^﹣1）