He gave me the phone number in order ______ contact him when we are in need of help.

With modern equipment，many mysteries have ________ to light in recent years.

What is in the room? –Therea chair and two beds.

The 2014 Summer Youth Olympic Games will be heldAugust 2014 in Nanjing . [ ]

I want to _________ at the meeting, but in the end I _________ nothing.