n D gets produced when animals are exposed to direct sunlight, for＿reason, itis always advisable to give them chances to spend time in the sun.

What’s wrong with him—-The picture he came across___his memoryof a sad story in his childhood.

The factory produces half a million pairs of shoes every year,_____ 80% are sold abroad. [ ]

The beautiful sunset ourattention，and westopped to watch it.

isn’t good enough figure,but his outstanding skill compensates for it.