The book was written in 1946, _______ the education system has witnessed great changes.
—Hello, is Mr Smith in? —Sorry, there is no such person _______ you referred to in my office.
Medical doctors sometimes can make mistakes _______ will cost ________.
The first painting Guilin Heights, which ______ several steep hills with the Li River _______ below, _______ over three meters tall.
________, I think, and the problems could be settled.
—Where will the peace talk be held? —It is in the hotel __________ we stayed last time we went to Beijing.