stretch :  连绵的，不断的。

example: Small boats travel up and down this stretch of river

assortment： 各种 an assortment of chocolates

catch a plane. catch your meaning. 赶上飞机，听懂你的话。常用过去态。

keen ,

keen do do something:, keen on doing somthing; 很想做。。

example:

My wife is quite keen to visit Europe

You don\'t sound very keen about the idea, though.

Well I am not. I\'d rather buy a new car with the money, instead.

So, which will it be? Wil you go to Eruope or buy a car?

Oh, we\'ll go to Europe, of course.

Why will you do something you aren\'t keen to do?

Because I\'m keen to live in peace with my wife.

French Riviera： 法国南部，气温变化很小的渡假区。

Question: What\'s the name of the underwater railway that connects England and France?

Answer: The English Channel Tunnel

Also called Channel .

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