—Remember to turn off the lights before leaving the classroom, children.—______.
– Can a plane fly _______ the Atlantic Ocean?--Yes, but it needs to go _______ the clouds for hours.
The man is very ill and he has _______.
They are _______ little sheep that we can’t make much money by selling _______.
______ of the people here live on rice,and the people there live _______ on noodles
They are very grateful _______ us _______ them so much help.