Self﹣driving is an area _______ China and the rest of the world are on the same starting line.( )
that
where
which
when
(陕西)No sooner ________ stepped on the stage than the audience broke into thunderous applause.
Only when you leave school________how much you love it.
So mysteriously ______ missing that many puzzles wait to be solved.
For a moment nothing happened, and then ______ all shouting together.
---I have finished my homework.---___________.Let’s go to play tennis.