One way to speciesunder’ threat of extinction – whatever the cause – is to remove them to zoosand parks and breed them there．

in London, the penniless American wandered on the pavement, ______ to find a job to make a living.

(2013·哈尔滨四校高三统一检测)Williams shows some challenging means ________ diners at their mystery lunch on Sunday might eat the special dish.

_____ the three deaths in the region, one person was also left missing from the April 25 sandstorm.

I,who _____yourgoodfriend,willshareyourjoysandsorrow.