Tom kept quiet about the accident ________ lose his job.
-- May I use your pen? Mine is broken. -- Of course, here are two and you can use ________ of them.
There is _________in today's newspaper.
The weather in Beijing is cooler than ________ in Guangzhou.
We found ________ necessary to protect the environment.
-Which would you like, rice or noodles? --_______is OK. I'm hungry.