If the machine makes a mistake -- ____ rarely happens -- it gives a warning in the form of a red light.
It can’t be denied that the Diaoyu Islands are _______ part of China and what some Japanese have done recently is actually _______ offence against Chinese people.
—How are you, Jack?—_____, I'm rather sick.
She _____ your birthday party, but she had to look after her mother in hospital.
—Conductor, can I get to Market Street on this train?—Of course.The train is leaving._____, please.
____ is clear ____ the Diaoyu islands have been China's inherent territory (固有领土)both from historical and legal aspects since ancient times.