Being asked if he could come to the party that night,                .

The thief fell to the ground, his left foot_______ and blood ________ down from his mouth.

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

With time _______ by, he began making films.

Almost all of his time ______ experiments, he has no time to visit his parents.