Not only the USA and Russia but also China ________ manned satellites to circle the earth.

He ran all the way to the station only _______________the train had already left

Why do you do volunteer work in the North-West?— I___ to improve the lives of the children there through my efforts

He said that it was wrong flowers and left．

Mr Smith will not be able to attend his son’s wedding ceremony, because he ________ an important speech.