19．A.yards

　　B．shelters

　　C．camps

　　D．cottages

　　答案　B　

　　解析　句意为：如果我们不团结起来，我们都将住在庇护所里。yard庭院；shelter庇护所，收容所；camp营地；cottage小村庄。

　　20．A.when

　　B．what

　　C．whether

　　D．how

　　答案　D　

　　解析　句意为：它并不关乎我们为自己得到什么，而是关乎如何协作。

　　Ⅲ.阅读理解

　　You may think that sailing is a difficult sport，but it is really not hard to learn it.You do not need to be strong.But you need to be quick.And you need to understand a few basic rules about the wind.

　　First，you must ask yourself，“Where is the wind coming from？Is it coming from ahead or behind or from the side？” You must think about this all the time on the boat.The wind direction tells you what to do with the sail.

　　Let’s start with the wind blowing from behind.This means the wind and the boat are going in the same direction.Then you must always keep the sail outside the boat.It should be at a 90° angle (角度) to the boat.Then it will catch the wind best.

　　If the wind is blowing from the side，it is blowing across the boat.In this case，you must keep the sail half way outside the boat.It should be at a 45°angle to the boat.It needs to be out far enough to catch the wind，but it shouldn’t flap (摆动)．It shouldn’t look like a flag on a flagpole.If it is flapping，it is probably out too far，and the boat will slow down.

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