While typing, Helen has a habit of stopping _____ to give her long and flowing hair a smooth.

The houses in this village are______built of bricks.

Progress so far has been very good . _______ ,we are sure that the project will becompleted on time.

The teacher was___ a very old man, but in fact he was only a little over fifty.

—I heard Charlotte had been drowned in the lake.—Really！Her boat turned______,and ______she couldn’t swim.