“ Although ,” the boy said , “ _______ over and over , the maths problem remained confusing to me ” .
______ he realized it was too late to return home.
Several of the off-shore islands are ______ , now that we have a motor boat.
It’s already 10 o’clock, I wonder how it ____ that she was two hours late on such a short trip.
Early _____ the morning of May 1, we started off _____ the mountain village.
One of the greatest benefits of Internet friendships is that they are based on common interests, ________ appearance, age or popularity.