第44句：

Following a telephone call to the police from an anonymous caller,hundreds of shoppers were shepherded out of the store while roads in the area were sealed off.

六级词汇讲解:
follow此处意为“在……少后”,其现在分词形式引导句子的状语。anonymous意为“匿名的”。be shepherded out of意为“从……中被引导出来”，shepherd此处为动词，本身含有“带领，引导;护送”之意。如:
The super star came in, shepherded by her guards.
这位超级巨星在保镖的护送下进来了。
seal off意为“封锁，封闭”。

六级考点归纳：
与seal有关的常见短语搭配还有:
1. seal up意为“(为防止空气、水等渗入或渗出)封闭”。如:
Those doors have been sealed up for years.
那些门已经封闭多年了。

2. seal sb.'s fate意为“决定某人的命运(尤指厄运)”。如:
The words would seal his fate for ever.
那些话将决定他今后的命运。

3. seal in意为“密藏，封住”。如:
Fry the fish quickly to seal in the flavor.
把鱼快速煎好以保持原味。