There are a number of words in the English language that were French in ______.
Only when he returned _________ that the war had ended and the army had come back.
--- Can you introduce me a high quality machine?--- My pleasure. _______ well even on wet roads, this kind of car is very popular.
September 8th,1931 is a special day,________, I think,that will be remembered by the Chinese forever.
I ______ him in time, otherwise he would have fallen off the bike.
_______ the calculation is right, scientists can never be sure that they have included all variables and modeled them accurately.