—May I use your computer?—Sure, _____________
Look at the naughty boy! You ______ have taught him how to behave himself.
Once harm ______ to the environment, it takes years to have the system recovered.
Staying in a hotel in Shanghai one day costs ____ renting a house in my hometown for a week.
The woman managed to send her three children to universities but ______ came to see her when she was old and seriously ill.
We regret to hear nearly half of the people in that area still live ______ the poverty line.