His sister has recently got engaged ____ a foreign teacher, who has engaged ____ education research for years.
As we all know, all living things ________ the sun for their growth.
--- Tommy, your mum has been out without glasses! --- Well, take it easy. _______ she is back home for them.
She can’t get down to work because she was deeply ________ by the news of his death.
It is high time for us to take measures to protect these old traditions and customs before they ___.
It is known that ________ medical examination helps people to find out health problems as early as possible.