19.[1999全國]I'm going to the post office.

________ you're there, can you get me some stamps ?

A. As

B. While

C. Because

D. If

 

答案:B
提示:

題目考查時間狀語從句連詞while的基本意義。

(1)只要;在…時間里:

例如:It was lovely while it lasted.當(dāng)它開著的時間它是很惹人喜愛的。

(2)在…同時;盡管,雖然:

例如:While the grandparents love the children, they are strict with them.“雖然祖父母們都愛他們的孩子,但卻對他們要求嚴(yán)格”。

(3)然而;而,而且:

例如:The soles are leather, while the uppers are canvas.鞋跟是皮的,而鞋面是帆布的。

題目考查第一層意義:“在…時間里;只要”。注意當(dāng)as用于“當(dāng)…時候”解時,從句中應(yīng)該用瞬時動詞。

 


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