Barack Obama delivered a speech to 500 local youths during his visit to China, many of were from Fudan University and Tongji University.
In Hangzhou, Mr. Black was so struck ______ the beauty of nature that he stayed ________ another night.
It is morning _____ we have four classes, not afternoon.
Mother told Jim to watch the milk until it boiled and then _________ off the gas.
The idea puzzled me so much that I stopped for a few seconds to try to _______.
----Will you be ____ this afternoon , John?----It depends. I’ m afraid I’ll be called in by my boss.