The genetic engineering, ______ progress has been very rapid recently, is perhaps the most important of all the sciences.
It is said that the World Golf Championships (世界高尔夫球锦标赛) to be held in Shanghai will be ______ on TV.
Is this research centre _____ is full of modern equipment you always mention.
What _______ it will be when you _______ on the white sand in the warm sun!
The person who is _______ of the factory _______ ill since last week.
The most important thing ______ we should consider is the first idea _____ he has talked about in the speech.