The Moonstone was ________in a real story which ________in England in the 1790s.
This box __________ all the books you need, __________ an English-Chinese dictionary.
We'd better set off or it will be dark __________ we know it.
They often use wood as fuel to __________ coal.
The policeman __________ to be reading a newspaper. In reality, he was watching the man near the window.
Athens __________ the birthplace of western civilization.