The development of industry has been ________ gradual process throughout ______ human existence from stone tools to modern technology.
It was on ________ Saturday in _______ July of 2009 that the famous scholar of Chinese traditional culture, Ji Xianlin, passed away.
When she was doing the cleaning yesterday, Mum found the ring that she _____ years ago.
They all looked _______at the teacher and felt very _______.
-----Hello ,Mr .Smith .This is Larry Jackson .I am afraid I won’t be able to arrive on time for the meeting in the office . ------_______.We ‘ll wait for you.
.The suggestion has been made _____the basketball game _____put off .