Even the best writers sometimes find themselves ______ for words.

单项选择题There were many talented actors out there just waiting（）.

A.to discover
B.to be discovered
C.discovered
D.being discovered

单项选择题Bats are surprisingly long-lived creatures, some ______ a life span of around 20 years.

单项选择题Galileo lived in the City of Pisa, ______ there is a leaning tower about 180 feet ______.

单项选择题You business interfering with my affairs.

单项选择题The villagers have already known ______ we'll do is to build the bridge.