Evidence of a powerful volcano, which erupted under the ice sheet of West Antarctica around 325BC and might still be active now, __________ so far by British scientists.
— This is the first time I my first picture with my own hands. — It is time that you a picture for me.
— Never thought to see you here! —
The central government is calling on the whole nation to make efforts to build harmonious society and new socialist countryside.
-- Jane Gooddall is a great woman. -- ______. She has done so much to protect chimps everywhere.
Email, as well as letters, ______ an important part in daily communication.