If you feel tired and sick of fat food, that is ______ you have to go to the hospital for medical examination.
Word came that the famous film star Chen Daoming was to _______ a new film.
If you don’t pay your gas bill , the gas will soon be _______.
_______, the teacher asked whether anyone wished to ask a question.
At the meeting they discussed three different ___ to the study of mathematics.,
— How could you ______ my sister so easily in the crowd? — Because she stood out in her red dress.