完成对话。

A:  Could you come and __1__ me, please?

B:  OK,I'm coming. What's wrong?

A:  I want __2__ do my homework here. But there is a big box __3__ my desk. Could you help me get it

     down?

B:  Certainly. Oh, dear! It's very heavy. What's in it?

A:  There're some bottles in it, I __4__  . 

B:  Is there __5__ food to eat?

A:  Let's open it and see. 

B:  Ah! It's full of bottles of orange.

国际海区安全水域标灯质有（）。

Ⅰ．明暗光；Ⅱ．等明暗；Ⅲ．长闪光；Ⅳ．莫尔斯信号“A”；Ⅴ．莫尔斯信号“D”。

A．Ⅰ～Ⅲ

B．Ⅱ～Ⅳ

C．Ⅰ～Ⅳ

D．Ⅰ～Ⅴ