The play had already been on for quite some time when we _______ at the New Theatre

is known to all is that the Diaoyu Islands have belonged to China since ancient times.

There are over 58000 rocky objects in ______space，about 900 of which could fall down onto ______ earth.

__________ he had not hurt his leg, John would have won the race.

下列各组词语中加点的字注音无误的一组是(　　)