It isn’t quite ___ whether the Tibetan antelope is still being hunted.

Dear classmates, we’ll study in different schools next term and enjoy your time in your new school.—___________.

Were you at home at 8:00 last night I called you but nobody answered.— Sorry, I a nap at that time.

This sentence is difficult to understand.Can you make of it?

He likes low-carbon life. He lives in the house ________ he built himself out of trash.