The two giant pandas are so much alike that it is impossible to ________ one from the other.
Mary won’t keep slim ______she takes exercise every day.
____I will go abroad for further study or not is my top concern these days.
---Would you mind my sitting here? --- ______. It’s for my girl friend.
—Do you know the newly appointed CEO? --__________.
Mr. Smith let off upon me the speech he_______ to make all along.