The teacher is standing ________ the blackboard.

It’s much easier to make friends____ you have similar interests

I didn’t know your mobile number; otherwise I _____ you the second I got to Changsha. [ ]

The news has spread all over the country________ an earthquake happened last night.

Have you been to Chinese People’sRevolution Military(革命军事) Museum—Yes. It’s in Beijing. And it’s _______in China.