I didn’t quite follow him because he explained the theory _____that is too abstract for me.
Evidence has been piled up________ drinking water after getting up in the morning contributes to one’s health.
Just imagine performing such an opera as Turandot in the Forbidden City. There ________ be a better setting!
Our government has taken some measures to overcome the lack of electricity, but it may take some time________ we have enough power.
Science and technology are advancing so quickly that________ is a possibility today may be a reality tomorrow.
Each person has his / her unique character which ________him / her from others.