Earth is believed ______ by an object the size of Mars at some point in the distant past before its surface cooled.
—How did your students express their thanks to you on Teachers’ Day? —A gift together with many flowers _______ sent to me .
Science and engineering students often _____ their heads in books instead of going to dances and cinema.
The storm died away at last with the golden waves ______ the shore in peace.
I have the same opinion as you ________ the privacy of one’s life should be kept secret.
Eating too much fat can _____ heart trouble and cause high blood pressure.