It was a pity that the great writer died ______ his work unfinished.

________，John returned to school from his hometown.

Many strange new means of transport have been developed in our century, the strangest of _______ being perhaps the hovercraft(气垫船).

 _________ the lecture going on, the students got more and more interested.

 With all the money ________, the man had to make a living by begging.