Everyone here will thank the firefighters for the things they have done to prevent fires _______ the environment safer.
.---You may find the key to the maths problem on page 107 . ---Ah, it’s so simple . I wonder why I of that .
---Ann looks hot and dry. ---So you if you had a high fever.
.—Excuse me, is the shop open around the clock? --- _________. Only from 8:00 a.m. to 4:00 p.m.
—I didn't go to work yesterday afternoon because my car broke down. —You ___ mine. I wasn't using it.
After supper she would sit down by the fire,sometimes for ______ an hour,thinking of her young and happy days.